Handywoman Rag Shuttles come 24" long or 15" long.  The 24" rag shuttle is 3" x 1.5"  wide and the 15" rag shuttle is  2.5" x 1.5" wide.
Both ends on the rag shuttle curve in so that there is less chance of hanging on the warp.  These are made from either maple or cherry.  If you have a preference let me know and I'll see if I can accommodate your request.