Sure, I will have to double check but I think it (Wide SCC) is 21". The seat that came with the Sit and Climb wasn't really bad. I just don't like the back section you have to strap around the tree and all the bulk while climbing. I saw the API seat similar to the Summit Seat and tried it. I returned it before settling on the Ol Man (Grand) mesh seat. I think Lone Wolf should go to a mesh seat and drop the price of the stand $20. It is just that all the other companies have these bulky seats people think they need and LW wants to compete. The mesh seat is comfy and make climbing a whole lot easier and safer in my opinion.