I'm very confused now too. I was at Holts trying on Large Paraty and what the SA called the Small Paraty. She said Holts never gets any Med Paraty bags.
Small was very nice but yes, slightly smaller than my typical "med" satchels...but online, I'm checking out dimensions and I don't know if the Mini Paraty is the same as Small or is there REALLY a tinier version of the Paraty? Maybe? On Luisaviaroma.com, they show a coral-pink-red mini Paraty on a model and yes, it does look especially tiny.
My guess is that the Med Paraty would be my top pick but Holts isn't going to get any. But is the "small" really the equivalent of what other retailers call Med? If that is the case, then I just tried on the "med" and I liked it except that (yes), it is a tad smaller than my typical med satchel. (Especially smaller zip top opening).
I've also got the added hassle of converting metric to imperial inches to double check my info...geez