I need to buy some but don't want to waist my money on them if they are a size that I wouldn't use very much.
I use different wire depending on how heavy my flower or decoration is. You'll need some pliers too...needle nose ones with a wire cutter.
I agree with Texas Rose...depends on what type of decorations you are using with the wire. When I first stared using wire, I remember the store didn't have all that many options...so I went for one that was in the mid-range compared to the others available. It was only about $2.00 and worked out well.