I have the So black in the 225 size. Its a great looking size for everthing under the sun (incl the dressier occasions such as weddings). I did try on the 226 and thought it was better suited for slightly casual situations, whereas the 225 is quite versatile across the board. Especially in this cool understated combo. Worth mentioning that the 225 size holds its shape better over time. Just my humble opinion though. Everyone is different and then again you are taller than me - I'm 5'3". Sorry couldn't tell from your post if you meant you already have classic flaps in M/L size. But if you don't, perhaps get it in the 225 since you don't have any in the in-between size. The 225 is equivilant to a Medium classic flap and holds a similar amount. Hope this helps and doesn't further confuse you. If all else fails, try it again in-store and go with what 'sings' to you the most.