My MIL gave me a bunch of yarn that she got many years ago while living in Germany. I'm about to dig it out and consider it for a sweater project, but since there's no label, and I've no clue exactly how much there is, how can I determine if I've enough for a big project.
If I know that the yarn is probably a worsted, which the pattern I'm interested in calls for, and I have approximately the weight of the yarn called for in the pattern...would I mostly likely be good to go if I'm getting gauge? I would, of course, actually plan on having a certain percentage over, as I wouldn't want to guess right down to the ounce or anything...but is that a reasonable way to estimate how much I'll need?
Any other suggestions?