Sony VAIO Slip Cover for Duo 13" Form-fitting sleeve with quick top-loading access Precise fit for laptops and ultrabooks with a 13.3 inch display Slim design allows you to carry the case by itself or in a bag Internal Dimensions: 13" x 0.4" x 9.5" (LxWxH) External Dimensions: 13.75" x 0.8" x 10.25" (LxWxH)