Vintage circa 1920s-30s  French blue and white cotton smock shirt.
 
No size or maker's mark on this. 
 
All cotton, a textured woven stripe. Its an overhead smock style with button down collar and bib front. Buttoned cufffs, selvedge at each side of the tail.  The letters GA are embroidered at the base of the smock placket.
 
Worn in, faded areas/ areas of uneven colour here and there. Its a little greyed from age and use.  Note that the cuffs show some wear and repair- and are patched on the insides- see photos. There's a patch on the shoulder and at the lower side by the tail and there are some scattered overstitched repairs at the back amongst the gathers. A few small holes and some scattered minor marks. Mismatched button at the collar.   
 
18" across the shoulders seam to seam
Sleeves are 23 1/2" from shoulder to the end of the sleeve
Back length from nape to hem is 40 3/4"
24" across the chest, pit to pit
Collar is  15 1/2"