I have been looking all over for a place that sells no-show socks(like for flats and ballerinas) but have had no luck to find them to fit my size, I wear a size 12.5-13 in womans shoes. Just wondering if anyone knew of any websites that might sell noshow socks that fit me? Thanks in advance!

You may search the internet by using the keywords "no-show socks". Even amazon.com displays various types of no show socks. I think the size is usually free size.

barbie~~

Lane Bryant has no show socks that work great for my size 12/13 women's feet.

You might also try footies - the pantyhose that just goes over your feet.  I wear them with my pumps.

I have similar sized feet and found that the ones from Nordstrom Rack for like $5 have done me good service.