For top of the romper you could use onesie, shirt or overall (chop to desired length ).
Make sure that they fit loosely
Mine has shoulder snap to take on and off.
If yours not, you may add zipper instead. A exposed zipper would be very cool
Or what about a snap band at crotch
Note: I forgot to topstich the pockets and must do it later
sew the shirt piece and pants together, sandwich pockets between them like this
sew the shirt piece and pants together, sandwich pockets between them like this
after sewing and turning right side out
Sew cuffs for pant legs and sleeves like I did HERE
(Note: I forgot to cut the cuffs shorter than the pants legs so I inserted elastic in the cuffs to make them smaller. And I love that look)
Then add some buttons for decorating the flaps pockets and keeping it laying flat.



































