How do you measure fishies???

Hey...
This must sound a bit of a stupid question!!!
I have been trying to find out when bn's start getting their bristles and most places are saying around 2 inches... Does this include the tail???
My longfin babies look really big but its all tail lol!

It varies to be honest.

For longfin especially it is better to use body length rather than total length because as you mention you have the long tail to contend with.

so total length goes from the tip of the head to the tip of the tail, body length is normally the distance from the tip of the head to the start of the tail fin, although, for some (generally scientific purposes) body length means tip of the head to the anus.

What we refer to size it is generally total length of a short fin or body length of a long fin.

Does that help, not sure if i explained that well enough haha

Yeah thats great thanks!
Gives me an idea of when to be on the lookout for stubble lol!