These measurements are close to exact but keep in mind that each playsuit is hand cut and hand sewn. The Babydoll playsuit has adjustable straps for a longer fit. The length is measured from the bottom of the front, where the playsuit buttons at saddle, to the top of the bib.
3/6m - 13"
6/12m - 15"
2T - 17"
3T - 18"
4T - 18" (measured from top of bib to bottom of skirt due to having bloomers as separates.)