You're not alone. My main reference is Classic because it was the only one I measured when I joined. I did it the correct way with the tape on the hairline... Still when I measured it recently it was 4 inches longer
I recently posted my measures in cm on my blog so here they are:
NL 44.5 (17.5")
SL 48.5 (19")
APL 60 (23.5")
BSL 69.5 (27")
WL 76 (30")
HL 89 (35")
BCL 95.5 (37.5")
TBL 101.5 (40")
CL 112 (44")
FTL 122 (48")
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