Here is what you will need:
Allie Oop Top & Dress pattern
Darby Shorts pattern
Both those patterns are from Brownie Goose. You could probably use any shorts pattern however this tutorial will be based on the Darby’s
Other than the patterns, you will also need your basic sewing supplies and elastic. I used ⅜” but you could use any size, you will just need to adjust your casing.
Lets get started.
First step is to determine your little one's size, print and cut/trace your pattern pieces for the front and back bodice and bias tape. There is no change to how these pieces are constructed. So, go ahead and cut and construct the front, and back bodice only. Cut and prep your bias tape and set it aside. I made my two button flaps functional since she would not be slipping it over her head. You will need a little more room for your little one to slip on and off, so plan on making your buttonholes functional too.
**Do not cut your skirt pieces yet** You will be skipping around a bit on the original instructions.
For the pattern piece labeled “skirt piece” you will make your first modification, which is to shorten the pattern piece. According to the sizing chart my daughter wears a size 2t, but she would need a size 4 in length if I were making the top the way it is. You'll need to measure your child to figure the correct length. The top version falls below the waist so it would be rather long for a romper if left as is. For my case, I left the size 2t length as is without lengthening it like I normally would instead of making the 4T and subtracting. I suggest taking 1.5-2” off the bottom. I wanted my top to be less fitting and more baggy, so I didn’t want too much off the length. I also made a muslin first so that I wouldn’t ruin my “good” fabric. I suggest you do the same if you have some scraps to spare so you can find your perfect fit. Another option would be to cut it according to the pattern length and try it on your little one prior to making any cuts to the bottom.