Hi Kevin. Since this is a website designed specifically for wholesale to school owners the discount prices you see here are what you will pay. As for how many and what sizes, that is entirely up to you and your friend. Take into consideration if you will be having kids classes and what age you will be advertising to. After that, grab up some kid size uniforms as well as 4's and 5's for the bulk of adults (maybe a few 6's for the large folks).