New PUMA shoes

Mens Puma Shoes. size 9.5 white leather with red trim. Gold PUMA emblem on the back. So my girl bought these shoes for me, which I loved, but it turns out that they are half a size too small. I tried to take them back for a bigger size, but since I wore them ONE time to a concert, I couldn't switch them out. The bottoms were dirty, sooo I tried wearing them again and I just can't do it. they're in Great shape, nice and clean, still have the stickers on the inside heel. anyways, thanks. Let me know and make an offer.