Acoustic Panels are 1" Thick Block Size - Once you split/ open the tiles the peak of the egg crate woud measure 1-1/4" Thick (Height) -- Very Good Quality High NRC !!. acoustical foam is a cost-effective, high-performing sound absorption foam panel that provides strong noise reduction over a wide range of frequencies. very good quality !! hi! feel free to ask me any question any time ! These panels enhance the sound and speech within a room. Each pad can provide decent noise reduction and can also be used as foam padding in various cases due to flexible integration choices. Can also provide sound absorption noise inside a computer chassis. *** Please Note we aim to cut every tile/wedge precise to 12" but - CNC Machine Tolerance Range - Can Measure 11" 7/8 (Under) to 12" 1/8 (Over) Final Cut. To easily apply on your wall on a budget without damaging the wall, please refer to our ( 3M Adhesive Tabs Mounting Double-Sided Foam Tape Squares, 1-Inch 32 Tabs ), can be Found On Amazon