100% original 
Soviet Army gymnasterka, tunic. 
It was used in the RKKA and the Soviet Army until 1969, as an element of military uniform.

USSR size: 50, height 4 (for height 172-182 cm). 

Measurements: 
Shoulder width - 47 cm (18.5'')
The width between the armpits - 60 cm (23.6'')
Sleeve length - 64 cm (25.2'')
Back length - 76 cm (29.9'')

Condition: warehouse storage, there are traces of storage, but otherwise NOS