There is a variation, so if size is important, then you should check your gauge. The fiber and the way it's spun affects the thickness. Some are just 'poofier' than others.
"Trust the pattern!"
Time flies like an arrow, but fruit flies like a banana.
Hop aboard while we follow the cloud-covered van of knitting harmony, man!! Woooo!! --Hedgehog
IngridKH on Ravelry