Cotton fleece rompers

I would like to report an issue with the cotton fleece romper I ordered in size 3–6 months. The size is too small for my 3-month-old,while his other rompers from other brands size 0-3 still fits ,, the bottom snaps keep opening.

Additionally, the green romper sheds a lot of green threads. The loose fibers got on my baby’s hands, and even after washing, it released threads and fibers that affected the other items in the wash which is not practical to wash it separately every time !