Oshkosh B'Gosh Light Denim Overalls Pleated Bubble Vestbak Pink Tag Size 3T

They are a light wash denim with the pink tag and green stitching detail in a few places. They snap between the legs. Very nice condition for age with no stains. Some wear and fading but they are vintage. These have nice pleats on the front and the back but I’m not sure if they are technically the “bubble” style. I