Original, unissued and gray, there no such thing as wrong sized gear, only wrong sized men.
M/36 cap has been in use from its adoption to Finnish army in 1936, there is countless modifications, versions, material changes and colors of the M/36 ( M/52 ,M/58, M/61, M/65....), but all were known as M/36.
These caps are 1960´s and 1970´s version of the same headgear, manufactured by the government uniform factory ( VPU ).
The cap is made of thick uniform canvas, the sides of the cap can be opened to protect ears and neck, the cap has a place for the cap badge. Almost all are 100% unissued, but the caps have been in storage since 1960´s, some minor faults are possible, but these are really fine specimen of M/36 cap.
The visors are different in length, specially the size 57 has quite short ones. Mosr haps have original factory slips on place.
Great piece for those who wish to have ww2 type Finnish uniform cap.
M/36 has a nickname it is called "blood scoop"
Size is army standard, the cap will give in about 0,5cm, and will fit better after some use. Measurement should be taken one finger width above ears in cm.