These are from vintage printed denim from my stash. I bought it when my kids were babies sometime in the early/mid 80's, but it looks 1970's to me. When we tried them on the waist was too low, so I added the waist band out of necessity and the bottom ruffles and waist tie followed to tie in the contrast fabric. The flower is one laying around I just safety pinned on. I'm pretty happy with the end result.
This rear gusset is what makes them "big butt". They are so cute on little diapered bottoms! I added piping to play up the feature. The pattern is $10. but is simple and unique at the same time. She does have a free downloadable for baby pants without the gusset.
There are two tiny grands at my house, so if I sew for one I try to sew for the other. This simple ruffle skirt is out of twill or a light weight denim from the stash and scrap lace. It broke up all those polka dots on the shirt and leggings. I doubled the fabric width for the second tier, I'm thinking now maybe 1 and 1/2 would have been better for the weight and hand of this fabric. I didn't use a pattern, but I was inspired by this picture and tutorial by Tanya Whelan at Grand Revival Designs. She does multiple tiers and also a version of a skort ruffle shorts, lots of other great stuff as well.
Now I have to stuff all those trims back into the drawer. Ah, well, it's a great way to take inventory.