This is a girls size 12 months Baby B'gosh by OshKosh B'gosh Vestbak Bubble Romper Overalls.  They have a red Baby B'gosh tag with embroidered Apples, Pears and Flowers around it. They were Made in the USA. 
It is made of a dark denim material that has a soft feel to it.  There are 2 blue buttons on the straps to adjust the length and blue buttons on the sides of the overalls.  There are snaps on the legs for easy diaper changes.  

This is a rare print and very hard to find.