We are able to supply large quantity and best quality copy paper.for 70gsm, a3, a4, b4, b5, 8.5x11", 16k, 8k are available;for 80gsm, a3, a4, b4, b5, 8.5x11", 8.5x13", 8.5x14", 11x17" are available, â 75gsm are aslo under production, there are a4, 8.5x11", 8.5x13", 8.5x14", andmore...