Uploaded image - 11 x 15 in. Opening: 10.75 x 14.75 in. (3 - 3 - 3 - 3) Total Size: 16.75 x 20.75 in. Top Mat: C1008 (16.75 x 20.75) - Crescent Ivory 32x40 Second Mat: C1015 (0.25) - Crescent Grey Violet 32x40 Foamboard (16.75 x 20.75) Formatted Image