Nike flex gym shoes

New Nike gym shoes Never worn, got them as a Christmas gift but didn’t fit me, if only they would’ve been 1/2 a size big 🥲. Couldn’t exchange since they haven’t been accepting returns. I wear a 6 or 6.5. I would say these run small, fit like a 5.5 but say 6. open to reasonable offers. Gray, light gray and green pastel color.