Dub5 ?

I always hear this term thrown around here in Portland, Oregon. Whenever I ask, nobody seems to know what it means! It seems to be the name of a strain, as people usually use it in sentences like

"Yo I got a dub5."
"My dealer got hooked up with a dub5, its really good."

Can anybody explain exactly what it means?

a dub is twenty...like twenty bucks or twenty inch rims...so a dub5 would be a twenty five dollar sack.

maybe half eighth

huh i guess that makes sense
usually i just say a 25sac or something like that