Angelic Tea Parties Question

Hi EGL.

I'm wondering if I can get some advice from AP's Tea Party owners?

I have the chance to buy a pair of pink AP Tea Parties in size M, but I generally wear a size S. Most of my shoes are size S, but some of my size S shoes are a bit tight.

I'm wondering if anyone can give me any advice on whether I should go for it and buy them or if they'll be too big on me?

How does sizing fit/etc?

Thank you!