Quilt size guide

Twin quilt size

A typical US twin mattress top is 38 × 75 in. With a 15-inch drop on each side and at the foot, the calculated quilt is 68 × 90 inches.

Quick answer

68 × 90 in

Derived from the 38 × 75 inch mattress top plus a 15 inch side and foot drop.

Custom dimension calculator

Size the quilt to the actual bed.

Measure the mattress top. Add the desired drop twice across the width and once at the foot. Add pillow tuck separately only if your design needs it.

Calculated quilt size68 × 90 in172.7 × 228.6 cmFormula: width + 2 × side drop; length + foot drop.

Plan the finish

Four measurements to confirm

  1. 1. Surface: measure the actual top width and length.
  2. 2. Drop: decide how far the quilt should hang on each side and at the foot.
  3. 3. Tuck: add a pillow tuck only when the planned bed styling uses one.
  4. 4. Process: allow for quilting and washing changes based on your materials and pattern.

Source notes

Last reviewed September 1, 2026