Granite Island top 1. standard size: 84x36, 98x36, 108x36 etc. 2. color: yellow, red, black, green etc Granite Kitchen Countertops/Vanity ... or custom size. We have been supplying pre-fabs (blanks), kitchen countertops, bathroom vanity tops, bar tops, islands, worktops, ... , residential apartment etc.1. Standard Countertops size: 98x26, 110x26,Island size: 98x36, 98x42, 110x36,Bar top size: 98x12, 98x16 ...