I have played enough games with enough people to find having an confined area for dice to roll a good thing to have. At the same time it should be aesthetically pleasing. I decided to try my hand at making one. A trip to Daiso turned up a SGD2.00 (~USD1.60) picture frame about A4 in size with enough thickness of frame to hold most throw of the dice yet not hide dice in the corner. Next I bought a cheap cork sheet from Art Friend for less than a dollar, which with a bit of trimming fitted the picture frame nicely where the glass was. Here's a look at the stuff I bought. And here is the completed dice tray along with some dice for comparison. The small dice are 12mm.