Beer Sizes in Spain and Portugal Beer sizes in spain are aptly explained in http://matadornetwork.com/nights/order-beer-spain/ (copa, cana, tanque, jarra, etc.)

In portugal, similar sizes appear but I've only heard of imperial and caneca. 

Are there other sizes of beer in Portugal/Spain?
Actually you have nice words to ask in Spain for a shooter beer, but I can add somes:

big quantity (1L or more)

mini
cachi


regular size (200cl-500cl)

tubo


little quantities:

cañita  
corto
chato  (used for beer but usually of wine)
zurito (basque country and andalucia but extendind all over Spain)


but we have also words to name beer bottles depending the size:

20cl bottle: 

botellin
quinto    (in north regions like Catalunya)


33cl bottle: 

tercio
mediana   (in north regions like Catalunya)


1 l  bottle: 

litro
litrona
xibi * 


* from Xibeca, Damm big bottles