I am new to air-softs and am using archery targets by www.McKensieTargets.com If you go to the site, scroll down to the Tuff Block target's last one. They are 24 by24by12deep. The bb's stick to the target and don't fall off. I set up 4 of them at different heights and different locations in garage. No mess. Cost me $20/target-well worth it.

Paul