Leather Tools

First I want to say thank you for your help in my past questions. I am looking to build a workbench and wanted to get any feedback on what I should include. Minimum size, optimum height, etc. I have already found a good source for granite. The owner of a local counter top place said he has two dumpsters of scrap leave his shop each week. I am free to take what I want. I also have a local metal shop that said he could get me a 3/8” (9.5mm) or 1/2” (12.7mm) thick piece of sheet metal for the bench top. That would be thick enough not to flex and allow me to glue, stain, hammer and skive. Then have a cutting board for work that I need to protect my tool edge. I look forward to hearing everyones feedback.