Features: 25 * 25cm acoustic foams Ideal for controlling the reflections of sound within a small room. Let you have more enjoyable sound by effectively controlling unwanted reverb and echo. Suitable for recording studios, control rooms, offices, vocal booth, etc. Specifications: Color: Black Material: Foam Thickness: 2cm Item Size: 25 * 25cm Package List: 12/24/36/48/60pcs * Acoustic Foams Kindly Tip: 1. Conversion: 1 inch= 2.54cm Size Approximately : These size is about Asian Size,general get one size smaller than US/EU size,Please reference to the size chart in the picture. Item Measure by hand, it could be 1-3cm different. hope you can understanding, will be sincerely appreciated. 2 .Please be reminded that due lighting effects, monitor's brightness/ contrast settings etc, there could be some slight differences in the color tone of the website's photo and the actual item.