if your talking about needles than you just knit with a bigger size needle. if you're talking about making it bigger than you just have to add on a bunch of stitches to see if it fits.
If you are knitting without a garment pattern. It's nearly impossible to translate people sizes from clothes to knitting. Unless a size determines "inches", sizes are not really determined and regulated for uniformity. They are set as a rule of thumb and each design company establishes what is a specific size. That's why clothes run bigger or smaller and not an exact fit. Also the marketing value, specially for female clothes, of wearing something that says size 2 and fits like a glove when you really are not a size2.
A size 30-34 would be a size 6-8 :)
the size rank of Kansas is 34
There is no easy way to convert a size 34 American to Australian. A US size 34 in a woman's blouse is equivalent to a size 12 in Australia.
adult size 34 (not like a size 1 i mean the proper number 34!)
Bust size
3
34 inches is 86.36cm
34 f
34
The area around the chest + cup siZe. 34 c. 34 inches aroumd. Cup size C
Someone from the Philippines with a shoe size of 34 would wear a child's size 2 in the USA.