I was excited to find a really affordable collection of these frames at MUJI (which is a beautiful store - feels sort of like the Japanese version of IKEA).
The largest size is about 12x16, so not huge, but still pretty good size. Perfect for an 8x10 or even a little bigger. If you have some tips on REALLY big acrylic frames, I'm all ears. I have a series of hand-painted panels that I'd love to frame this way. I found some huge sheets at Home Depot that I'm going to go investigate.
Have a great weekend everyone!!