diff --git a/apps/mobile/src/app/(app)/pr-review/[owner]/[repo]/[number]/_layout.tsx b/apps/mobile/src/app/(app)/pr-review/[owner]/[repo]/[number]/_layout.tsx
index aa75b15b70..3d8b4cc16d 100644
--- a/apps/mobile/src/app/(app)/pr-review/[owner]/[repo]/[number]/_layout.tsx
+++ b/apps/mobile/src/app/(app)/pr-review/[owner]/[repo]/[number]/_layout.tsx
@@ -51,6 +51,7 @@ export default function PrReviewNumberLayout() {
   const sheetOptions = {
     presentation: 'formSheet' as const,
     sheetAllowedDetents: [0.5, fullSheetDetent] as [number, number],
+    sheetInitialDetentIndex: 'last' as const,
     sheetGrabberVisible: true,
     headerShown: false,
   };
diff --git a/apps/mobile/src/components/pr-review/merge/pr-merge-sheet-parts.tsx b/apps/mobile/src/components/pr-review/merge/pr-merge-sheet-parts.tsx
index f2ec085882..b6073aad6f 100644
--- a/apps/mobile/src/components/pr-review/merge/pr-merge-sheet-parts.tsx
+++ b/apps/mobile/src/components/pr-review/merge/pr-merge-sheet-parts.tsx
@@ -43,11 +43,11 @@ function MethodPicker({
   onChange: (next: AllowedMergeMethod) => void;
 }>) {
   return (
-    <View className="gap-0.5">
-      <Text className="text-xs font-medium uppercase tracking-wide text-muted-foreground">
+    <View className="gap-1.5">
+      <Text className="text-sm font-medium uppercase tracking-wide text-muted-foreground">
         Method
       </Text>
-      <RadioGroup label="Method" className="flex-row flex-wrap gap-1">
+      <RadioGroup label="Method" className="flex-row flex-wrap gap-2">
         {methodOptions.map(option => {
           const active = method === option.value;
           // Long labels stay readable via accessibilityLabel; chip shows short text.
@@ -62,7 +62,7 @@ function MethodPicker({
               {...radioItemA11y({ label: option.label, checked: active, disabled: isDisabled })}
               accessibilityHint={PR_MERGE_DESCRIPTIONS[option.value]}
               className={cn(
-                'min-h-8 items-center justify-center rounded-full border px-2.5 py-1 active:opacity-70',
+                'min-h-11 items-center justify-center rounded-full border px-4 py-2 active:opacity-70',
                 active && 'border-primary bg-primary',
                 !active && isDisabled && 'border-hair-soft bg-secondary',
                 !active && !isDisabled && 'border-border bg-secondary'
@@ -70,7 +70,7 @@ function MethodPicker({
             >
               <Text
                 className={cn(
-                  'text-xs font-medium',
+                  'text-sm font-medium',
                   active && 'text-primary-foreground',
                   !active && isDisabled && 'text-muted-foreground',
                   !active && !isDisabled && 'text-foreground'
@@ -99,8 +99,8 @@ function CommitTitleField({
 }>) {
   const colors = useThemeColors();
   return (
-    <View className="gap-0.5">
-      <Text className="text-xs font-medium text-foreground">Commit title</Text>
+    <View className="gap-1.5">
+      <Text className="text-sm font-medium text-foreground">Commit title</Text>
       <TextInput
         ref={inputRef}
         defaultValue={titleRef.current}
@@ -112,7 +112,7 @@ function CommitTitleField({
           titleRef.current = value;
         }}
         className={cn(
-          'min-h-9 max-h-12 rounded-md border border-input bg-background px-3 py-1 text-sm leading-5 text-foreground',
+          'min-h-11 rounded-md border border-input bg-background px-3 py-2 text-sm leading-5 text-foreground',
           'focus:border-ring'
         )}
         multiline
@@ -137,8 +137,8 @@ function CommitMessageField({
   const keyboardVisible = useFormSheetKeyboardVisible();
   const tight = compact || keyboardVisible;
   return (
-    <View className="gap-0.5">
-      <Text className="text-xs font-medium text-foreground">Commit message</Text>
+    <View className="gap-1.5">
+      <Text className="text-sm font-medium text-foreground">Commit message</Text>
       <TextInput
         ref={inputRef}
         defaultValue={messageRef.current}
@@ -150,9 +150,9 @@ function CommitMessageField({
           messageRef.current = value;
         }}
         className={cn(
-          'rounded-md border border-input bg-background px-3 py-1 text-sm leading-5 text-foreground',
+          'rounded-md border border-input bg-background px-3 py-2 text-sm leading-5 text-foreground',
           'focus:border-ring',
-          tight ? 'max-h-12 min-h-9' : 'min-h-11 max-h-16'
+          tight ? 'max-h-16 min-h-11' : 'min-h-24 max-h-40'
         )}
         multiline
         textAlignVertical="top"
@@ -178,7 +178,7 @@ function DeleteBranchToggle({
     return null;
   }
   return (
-    <View className="flex-row items-center justify-between rounded-lg bg-secondary px-3 py-1.5">
+    <View className="flex-row items-center justify-between rounded-lg bg-secondary px-4 py-3">
       <Text className="flex-1 pr-3 text-sm font-medium">Delete branch</Text>
       <Switch
         accessibilityLabel="Delete branch after merge"
@@ -236,7 +236,7 @@ export function MergeSheetFormBody(props: {
 
   return (
     <>
-      <View className="gap-1.5 px-6 pt-1.5">
+      <View className="gap-4 px-6 pt-4">
         {noMethodsAllowed ? (
           <View className="rounded-md border border-border bg-secondary p-3">
             <AccessibleStatus
@@ -286,9 +286,8 @@ export function MergeSheetFormBody(props: {
         ) : null}
       </View>
 
-      <PrFormSheetFooter className="pb-1 pt-1">
+      <PrFormSheetFooter>
         <Button
-          size="sm"
           onPress={onConfirm}
           loading={isMutating}
           disabled={
@@ -301,11 +300,10 @@ export function MergeSheetFormBody(props: {
           <Text>{submitLabel}</Text>
         </Button>
         <Button
-          size="sm"
           variant="ghost"
           onPress={onDismiss}
           disabled={isMutating}
-          className="mt-0.5"
+          className="mt-2"
           accessibilityLabel="Cancel"
         >
           <Text>Cancel</Text>
diff --git a/apps/mobile/src/components/pr-review/pr-form-sheet-chrome.tsx b/apps/mobile/src/components/pr-review/pr-form-sheet-chrome.tsx
index 5856949bc0..f955888956 100644
--- a/apps/mobile/src/components/pr-review/pr-form-sheet-chrome.tsx
+++ b/apps/mobile/src/components/pr-review/pr-form-sheet-chrome.tsx
@@ -22,7 +22,6 @@ import { type ReactNode, useEffect, useState } from 'react';
 import { Keyboard, Platform, View } from 'react-native';
 
 import { ScreenHeader } from '@/components/screen-header';
-import { cn } from '@/lib/utils';
 
 export function useFormSheetKeyboardVisible(): boolean {
   const [visible, setVisible] = useState(false);
@@ -63,14 +62,9 @@ export function PrFormSheetHeader(props: { title: string; eyebrow: string; onBac
  * Trailing ScrollView footer for formSheets. No keyboard-height padding —
  * parent ScrollView automaticallyAdjustKeyboardInsets owns that.
  */
-export function PrFormSheetFooter(props: { children: ReactNode; className?: string }) {
+export function PrFormSheetFooter(props: { children: ReactNode }) {
   return (
-    <View
-      className={cn(
-        'mt-0.5 border-t-[0.5px] border-hair-soft bg-background px-6 pb-1.5 pt-1',
-        props.className
-      )}
-    >
+    <View className="mt-0.5 border-t-[0.5px] border-hair-soft bg-background px-6 pb-4 pt-3">
       {props.children}
     </View>
   );
diff --git a/apps/mobile/src/components/pr-review/pr-review-comment-composer-parts.tsx b/apps/mobile/src/components/pr-review/pr-review-comment-composer-parts.tsx
index efa9e27df4..13908f74e7 100644
--- a/apps/mobile/src/components/pr-review/pr-review-comment-composer-parts.tsx
+++ b/apps/mobile/src/components/pr-review/pr-review-comment-composer-parts.tsx
@@ -72,17 +72,16 @@ export function ComposerFooter({
 }): ReactNode {
   return (
     // Lives inside the formSheet ScrollView (not a sticky sibling).
-    // size=sm + tight footer: half-detent + empty-body error must keep Cancel
-    // above the closed-sheet limit (~874) without scrolling.
-    <PrFormSheetFooter className="pb-1 pt-1">
+    // Half detent stays a drag-down; keep Cancel above the closed-sheet
+    // limit (~874) without scrolling.
+    <PrFormSheetFooter>
       {isEdit ? (
-        <Button size="sm" onPress={onSave} disabled={primaryDisabled} accessibilityLabel="Save">
+        <Button onPress={onSave} disabled={primaryDisabled} accessibilityLabel="Save">
           <Text>Save</Text>
         </Button>
       ) : (
         <>
           <Button
-            size="sm"
             onPress={onCommentNow}
             loading={isSubmitting}
             disabled={primaryDisabled}
@@ -91,11 +90,10 @@ export function ComposerFooter({
             <Text>Comment now</Text>
           </Button>
           <Button
-            size="sm"
             variant="secondary"
             onPress={onAddToReview}
             disabled={isSubmitting}
-            className="mt-0.5"
+            className="mt-2"
             accessibilityLabel="Add to review"
           >
             <Text>Add to review</Text>
@@ -103,11 +101,10 @@ export function ComposerFooter({
         </>
       )}
       <Button
-        size="sm"
         variant="ghost"
         onPress={onCancel}
         disabled={isSubmitting}
-        className="mt-0.5"
+        className="mt-2"
         accessibilityLabel="Cancel"
       >
         <Text>Cancel</Text>
@@ -139,7 +136,7 @@ export function ContextPreview({
   const previewText = preferFallback ? '' : (selection?.selectedText ?? '');
   // Single-line context keeps half-detent + keyboard-open room for CTAs.
   return (
-    <View className="gap-0.5 rounded-lg border border-hair-soft bg-secondary px-3 py-1.5">
+    <View className="gap-0.5 rounded-lg border border-hair-soft bg-secondary px-4 py-2">
       <Text className="font-mono-medium text-[11px] text-muted-foreground" numberOfLines={1}>
         {path} {side} {lineLabel}
       </Text>
diff --git a/apps/mobile/src/components/pr-review/pr-review-comment-composer.tsx b/apps/mobile/src/components/pr-review/pr-review-comment-composer.tsx
index 591e08f0fa..124816c931 100644
--- a/apps/mobile/src/components/pr-review/pr-review-comment-composer.tsx
+++ b/apps/mobile/src/components/pr-review/pr-review-comment-composer.tsx
@@ -319,7 +319,7 @@ export function PrReviewCommentComposer(props: PrReviewCommentComposerProps) {
         automaticallyAdjustKeyboardInsets
         keyboardDismissMode="interactive"
       >
-        <View className="gap-1.5 px-6 pt-1.5">
+        <View className="gap-4 px-6 pt-4">
           <ContextPreview
             selection={selection}
             fallbackPath={path}
@@ -328,7 +328,7 @@ export function PrReviewCommentComposer(props: PrReviewCommentComposerProps) {
             preferFallback={isEdit}
           />
           <View className="gap-1">
-            <Text className="text-xs font-medium text-foreground">Comment</Text>
+            <Text className="text-sm font-medium text-foreground">Comment</Text>
             {isEdit || draft.settled ? (
               <CommentBodyField
                 inputRef={bodyInputRef}
diff --git a/apps/mobile/src/components/pr-review/pr-review-submit.tsx b/apps/mobile/src/components/pr-review/pr-review-submit.tsx
index 8d25053eb2..9d98135c38 100644
--- a/apps/mobile/src/components/pr-review/pr-review-submit.tsx
+++ b/apps/mobile/src/components/pr-review/pr-review-submit.tsx
@@ -250,7 +250,7 @@ export function PrReviewSubmit(props: PrReviewSubmitProps) {
         automaticallyAdjustKeyboardInsets
         keyboardDismissMode="interactive"
       >
-        <View className="gap-2 px-6 pt-2">
+        <View className="gap-4 px-6 pt-4">
           <ReviewEventChips
             value={event}
             disabled={isSubmitting}
@@ -339,7 +339,7 @@ export function PrReviewSubmit(props: PrReviewSubmitProps) {
               }
             }}
             disabled={isSubmitting}
-            className="mt-1"
+            className="mt-2"
             accessibilityLabel="Cancel"
           >
             <Text>Cancel</Text>
diff --git a/apps/mobile/src/components/pr-review/review-event-chips.tsx b/apps/mobile/src/components/pr-review/review-event-chips.tsx
index 6e3f30daf3..b566c9f1f3 100644
--- a/apps/mobile/src/components/pr-review/review-event-chips.tsx
+++ b/apps/mobile/src/components/pr-review/review-event-chips.tsx
@@ -22,10 +22,10 @@ export function ReviewEventChips(props: {
 }) {
   return (
     <View className="gap-1.5">
-      <Text className="text-xs font-medium uppercase tracking-wide text-muted-foreground">
+      <Text className="text-sm font-medium uppercase tracking-wide text-muted-foreground">
         Review event
       </Text>
-      <RadioGroup label="Review event" className="flex-row flex-wrap gap-1.5">
+      <RadioGroup label="Review event" className="flex-row flex-wrap gap-2">
         {EVENT_OPTIONS.map(option => {
           const active = props.value === option.value;
           return (
@@ -38,14 +38,14 @@ export function ReviewEventChips(props: {
               }}
               {...radioItemA11y({ label: option.label, checked: active, disabled: props.disabled })}
               className={cn(
-                'min-h-9 items-center justify-center rounded-full border px-3 py-1.5 active:opacity-70',
+                'min-h-11 items-center justify-center rounded-full border px-4 py-2 active:opacity-70',
                 active ? 'border-primary bg-primary' : 'bg-secondary',
                 !active && (props.disabled ? 'border-hair-soft' : 'border-border')
               )}
             >
               <Text
                 className={cn(
-                  'text-xs font-medium',
+                  'text-sm font-medium',
                   active ? 'text-primary-foreground' : 'text-foreground',
                   !active && props.disabled && 'text-muted-foreground'
                 )}