[cslithergo]

My instructions say 3/8 inch but I agree that 1/2 inch would be better. I think the clip will probally pull out with the smaller hole. IF you have problems call BJ's Upholstery, 20235 Follage Road, Granby, MO at 417-325-6297. That is who made my interior for B&B amd the number they put in my package. Hope this helps.
Chris