These blouses, called huipiles, because of the shape, are iconic of Oaxaca. This one is in excellent vintage condition and comes from the coastal region of Oaxaca called Pinotepa Nacional.

This one would fit a 2 to 3 year old, I think.

Currently this one has these measurements:
Chest approx 24" around
Length approx 14"

One of the nice things about these is how easy it is to adjust the size. One line of stitching on either side does the trick.

Both sides are embroidered with the same pattern.