Burberry classic check cotton bucket hat Size S/M

Questions? Leave a comment below! I am the original owner of this Burberry hat. This is supposed to be a small/medium but it does not fit my head. I cut the inside head band to try to get it to fit. I believe this runs small. It has barely been worn. The hat was not affected by the cuts to the inside. See pictures. It made it more comfortable. I discounted it due to the adjustment. Classic Burberry style. In their golf line. The fabric has absolutely no stains or mars.