Sihnman 10 X 3 Straight Steel Flat Plate (2 pc) with Powder Coating as Mending Plate, Joining Brackets, Connecting Brackets, I Strap. Metal Plate with Holes, Straight Flat Plate for Truss framing

We needed plexiglass to make an antique boat windshield. Bought 3/8 first; nice material but too thick for this use, so returned it (very easy with Amazon) and bought the 1/4, which was perfect for this project. This material was easy to cut (keep the paper on), edge sand, and trim fit to the contour of the boat after using cardboard templates we made for the initial fit and cuts. We learned we should keep the paper on the acrylic until all fit trimming was complete, to protect the acrylic from scratches and handling before installing/completing the project.

Used a fish tank lid.

Its exactly what it says on the tin. No scratches or chips, its 12x24 down to 1/10th inch and it drilled easily and cleanly with a standard bit (but go slowly; drilling stuff like this generates lots of heat and it stinks while its cutting). I used it for an under desk kick plate to protect my wall and its holding up great.

The thickness is spot on. The actual dimensions are a 16th shy, which is the only reason I knocked a star off. Thats probably the industry standard but Id prefer not to have to buy an oversized piece and cut it down to get exactly 24x12. Ill just scale my project sightly.