@zozo the sheets come precut so if you place an order on the website you can do so with the exact measurements. And the u channel those acrylic sheets go inside that channel. So for example 12mm pvc u channel is for bonding both acrylics. Both are 3mm= 6mm remember you have 10mm space because the sides of thr u channel is 1mm. And after glueing those two sheets on the side of the u channel you will have space in the middle for led strip. The ones i put up on the link are narrow ones which are 4mm. Which is the space left. And good idea on the hanging idea.