I decided since I had recently mastered the ruffle that this meant I should really try to make ruffle bottom onesies...I've been dying to make these! I started off with the onesies and choosing my fabric/ribbon. I sewed down the middle of the fabric/ribbon with the loosiest stich on my machine. Next I pulled the top thread to make the ruffle. I pulled it pretty tight, and then loosened it to make it fit the length of the onesie. Next pin the ruffle onto the onesie where you would like the ruffle. I hadn't pinned in my previous trys, but with this you really want it to be perfectly straight. Once pinned I I sewed down the middle of the ruffle. Then continue on with the rest of your ruffles, mine are less than an inch apart to create a close ruffle. (As you can see with the fabric ruffles they are slightly wider so I only put 2, 3 just looked too crowded. All done and ready to enjoy!