Round shape riders. 10" x 10", 4mm corrugated plastic (1/8" thickness) Available in Red/White, Blue/White, Black/White & Black/Yellow. The rider can be attached using Velcro, double sided tape or bolted to your metal sign. Please specify if you will need holes drilled and where on the sign the bolt hole should be (bottom center, center or top center are your choices). On corrugated signs, we suggest using our 8 inch V-Wire or our 4 inch Quik Grip Rider Clip. Please note: the thin green outer circles shown on the round rider images are a cut line and will not show on the actual rider.