Vintage circa 1930s British double breasted cotton chore jacket.
 
No size label or maker's mark on this one.  Its smaller and looks to have been bespoke tailored, most likely overseas for Brtish Ex-pats working or serving overseas in warmer climates. 

Simple unlined cotton jacket with double breasted single button fastening. Two lower slip pockets, chest pocket and plain cuffs. Pointed lapels, one with a button hole. Unlined. 
 
Being sold "as is"- note that this is marked at the lower front with an ink mark with further marks at the lower hem edge.  Some feint marks here and there and some brown spots on the sleeve and at the lower front.  The letters E&B are inked inside.
 
See photos.
 

16" seam to seam across the shoulders at the back
Sleeves are 22 3/4"  from the shoulder seam to the end of the sleeve
From nape to hem is 27 1/2"
19" across the chest under the arms, the same across the back, measured flat, side to side, pit to pit 
16 1/2" across at approx waist height
18 3/4" across the bottom edge, side to side, when fastened