I don't give up quickly. I finally did find the length of armbands in a price-list from
the Winkler-concern at Dresden.
The armband for SA and party-member was 13x40 cm, but available as well as 12.5x40 cm.
For the greatcoat it was 12.5x42/43 cm;
for the SS it was 13x40.5 cm, for the great-coat it was 13x43/44 cm;
for SS leaders it was 13x40.5/41 cm, for the greatcoat 23x43/44 cm
AND....for the HJ: about 11.0x40,0 cm for the one with printed swastika;
with sewn-on swastika it was 10.5x 38/40 cm
for the greatcoat it was 11.5x40/41cm.
maybe you collectors get dizzy somehow?? The hunt is on, isn't?