Every German field blouse was stamped inside with 5 different size measurements as follows:
-Back length
-Collar size
-Chest size
-Overall length
-Sleeve length
Not every reproduction field blouse has correct size markings- many are unmarked. I make size stamps for my uniforms because I think it is a detail that adds realism. To find out how the actual measurements of a garment corresponded with the stamped sizes, I measured 5 different unaltered original Heer enlisted issue wool field blouses. I then took this small sample and looked at the numbers. There was no exact ratio that always held true. This may be because the garments were worn and may have stretched or shrunk with use or over time. Or, it could be a result of manufacture variation. Based on this quick survey, I came to make size stamps for my uniforms based on the following formula. Note that all sizes are in centimeters.
-Back length: Measure from the base of the collar straight down the back to the level of the bottom of the bottom belt hook hole, and add 1 to this measurement.
-Collar size: Measure the inside of the collar from the hook to the eyelet, and use this exact number.
-Chest size: Button the field blouse, measure from armpit to armpit across the front, double this number, then subtract 8.
-Overall length: Measure from the base of the collar to the bottom edge of the skirt in the back, and add 3.
-Sleeve: Measure from the seam at the top of the soldier straight down to the bottom sleeve edge, and add 1.
There exists a chart that purports to show the original range of sizes for each measurement based on chest size. For making the stamps on my own uniforms I have not referred to this chart, preferring to stamp these according to the sizes that they actually are.
For reference, here are the measured and stamped sizes for each of the 5 tunics.
Tunic 1 (M43)
Back length: Measured 41, stamped 43
Collar: Measured 42, stamped 42
Chest: Measured 98, stamped 92
Length: Measured 69, stamped 72
Sleeve: Measured 64, stamped 64
Tunic 2 (M40)
Back length: Measured 40, stamped 41
Collar: Measured 40, stamped 41
Chest: Measured 98, stamped 90
Length: Measured 65, stamped 68
Sleeve: This tunic has repaired sleeve ends.
Tunic 3 (M40)
Back length: Measured 40, stamped 41
Collar: Measured 41, stamped 41
Chest: Measured 98, stamped 90
Length: Measured 65, stamped 68
Sleeve: Measured 58, stamped 61
Tunic 4 (M43)
Back length: Measured 45, stamped 43
Collar: Measured 39, stamped 40
Chest: Measured 88, stamped 88
Length: Measured 71, stamped 72
Sleeve: Measured 63, stamped 64
Tunic 5 (M43)
Back length: Measured 43, stamped 43
Collar: Measured 43, stamped 43
Chest: Measured 105, stamped 96
Length: Measured 71, stamped 72
Sleeve: Measured 61, stamped 62