As Greg said. I would also add that, a small wing will usually have shorter blades than a mid wing. You usually want to maintain optimal spacing between your hands on the shaft and between the hand and the blade. This means that if the blade is shorter, the overall length of the paddle will be shorter too. So, when you pick a small wing it might have to be shorter overall than a mid wing. At least that's what I've determined so far based on my brief ownership of a Think Power Wing, which has significantly smaller blades than my Epic mid wing. 208 vs. 212 cm respectively.
I suppose, you could alternatively, lengthen the small wing to have more space between your hand and the blade or possibly less space between your hands. That's because you need less leverage with a smaller paddle, thus increasing your forward reach and minimizing effort by keeping your arms closer together and the upper arm a bit lower than you would with a larger paddle. Meaning, you could modify your stroke to take advantage of the paddle, rather than just use it like a smaller version of a bigger paddle... I have not paddled enough yet with the small Think wing, but so far I seem to like it because it gives me a bit closer catch as it is narrower and it is easier on my body. Needing to be more precise with it is a bonus aid in improving my paddling technique ...