Thank you so much. This peice is about 1/4''- 3/8'' thick & I always bake at the recommended temp,(270 -275) although clays differ according to brand. Another tip( I didn't think it was important till I burned my first peice) an oven thermometer. I check my temp every 10 or so peices because I use a large toaster type oven. Pre-heating the oven can also help keep the temp more even while baking. As far as a bezel I've never used a metal premade bezel although I would like to try (my local craft store is 65 miles away so I dont get there too often). So I would probably just use glue, or you could use a thin layer of liquid clay between your peice & the bezel & then bake or rebake. I hope I was of some help, I love questions so feel free to ask & I try to answer the best I can.