diff --git a/src/features/github/Github.module.css b/src/features/github/Github.module.css
index caf68f7c..28bcfbfc 100644
--- a/src/features/github/Github.module.css
+++ b/src/features/github/Github.module.css
@@ -37,7 +37,11 @@
   white-space: nowrap;
 }
 .repo {
+  min-width: 0;
   margin-left: 8px;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
   color: var(--fg-subtle);
   font-size: var(--fs-small);
 }
diff --git a/src/features/github/PullRequestsView.tsx b/src/features/github/PullRequestsView.tsx
index 234b3335..443c4fd1 100644
--- a/src/features/github/PullRequestsView.tsx
+++ b/src/features/github/PullRequestsView.tsx
@@ -591,5 +591,10 @@ export function PullRequestsView() {
 export function PullRequestsHeader() {
   const availability = useGithub((s) => s.availability);
   if (availability?.kind !== "ready") return null;
-  return <span className={styles.repo}>{availability.repo.nameWithOwner}</span>;
+  const name = availability.repo.nameWithOwner;
+  return (
+    <span className={styles.repo} title={name}>
+      {name}
+    </span>
+  );
 }
diff --git a/src/ui/Select.module.css b/src/ui/Select.module.css
index 6aafcfa0..f0b63981 100644
--- a/src/ui/Select.module.css
+++ b/src/ui/Select.module.css
@@ -72,14 +72,29 @@
   flex: none;
   color: var(--fg-muted);
 }
-/* The label keeps its width (up to most of the row); a long detail (a path) is cut instead. */
+.sizer {
+  height: 0;
+  overflow: hidden;
+  visibility: hidden;
+}
+/* Mirrors a List row: inset, padding and gap. */
+.sizerRow {
+  display: flex;
+  gap: 6px;
+  margin: 0 var(--list-inset, 6px);
+  padding: 0 8px;
+  white-space: nowrap;
+}
 .optionLabel {
   flex: 1 0 auto;
-  max-width: 70%;
   overflow: hidden;
   text-overflow: ellipsis;
   white-space: nowrap;
 }
+/* The label keeps its width (up to most of the row); a long detail (a path) is cut instead. */
+.withDetail {
+  max-width: 70%;
+}
 .detail {
   flex: 0 1 auto;
   min-width: 0;
diff --git a/src/ui/Select.tsx b/src/ui/Select.tsx
index 963dd036..f6730b46 100644
--- a/src/ui/Select.tsx
+++ b/src/ui/Select.tsx
@@ -127,6 +127,16 @@ export function Select<V extends string = string>({
         className={styles.popup}
       >
         <div tabIndex={-1} data-autofocus onKeyDown={onPopupKey} className={styles.popupInner}>
+          {/* Virtualised rows are absolutely positioned; this sizes the popup to the widest label. */}
+          <div aria-hidden className={styles.sizer}>
+            {options.map((o) => (
+              <div key={o.value} className={styles.sizerRow}>
+                <span className={styles.check} />
+                {o.icon && <Icon name={o.icon} size={14} />}
+                <span>{tx(o.label)}</span>
+              </div>
+            ))}
+          </div>
           <List
             items={options}
             getKey={(o) => o.value}
@@ -144,7 +154,7 @@ export function Select<V extends string = string>({
               <>
                 <span className={styles.check}>{o.value === value && <Icon name="check" size={12} />}</span>
                 {o.icon && <Icon name={o.icon} size={14} />}
-                <span className={styles.optionLabel}>{tx(o.label)}</span>
+                <span className={clsx(styles.optionLabel, o.detail && styles.withDetail)}>{tx(o.label)}</span>
                 {o.detail && (
                   <span className={styles.detail} title={o.detail}>
                     {tx(o.detail)}