diff --git a/src/video-grid/model.ts b/src/video-grid/model.ts
index 5150acef..15973c41 100644
--- a/src/video-grid/model.ts
+++ b/src/video-grid/model.ts
@@ -543,8 +543,8 @@ export function cycleTileSize(tileId: string, g: Grid): Grid {
   // To make the tile appear to expand outwards from its center, we're actually
   // scanning for locations to put the *center* of the tile. These numbers are
   // the offsets between the tile's origin and its center.
-  const scanColumnOffset = Math.floor((toWidth - 1) / 2);
-  const scanRowOffset = Math.floor((toHeight - 1) / 2);
+  const scanColumnOffset = Math.floor((toWidth - fromWidth) / 2);
+  const scanRowOffset = Math.floor((toHeight - fromHeight) / 2);
 
   const nextScanLocations = new Set<number>([from]);
   const rows = row(g.cells.length - 1, g) + 1;
diff --git a/test/video-grid/model-test.ts b/test/video-grid/model-test.ts
index f7d03309..479f9cb1 100644
--- a/test/video-grid/model-test.ts
+++ b/test/video-grid/model-test.ts
@@ -273,9 +273,9 @@ dbbe
 fghi
 jk`,
   `
-abhc
-djge
-fik`
+akbc
+djhe
+fig`
 );
 
 testCycleTileSize(