Round mirrors trays are 5 INCHES in diameter with a 1.7 mm thickness, perfect for wall decor or even use as mirror coasters. Originally marketed for arts and crafts, candle holder, wall decor and so on… But throw this on your rotating display! 📣See my listing for rotating display— You can just set it on top! No need to glue it in, though you certainly may... But I think it’s nice to have the option to use a mirror sometimes and other times just have the plain black surface. Plus YOU GET TO WRITE IT ALL OFF ON YOUR TAXES👏💃🪩