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Butterfly needles
Safety needles will be 22g or less. Butterfly needles will be 21g or less.
triple the size of [normal] human needles..
20mm knitting needles are needles that are 20mm in diameter. They are also known as US size 35 needles.
Why?
Butterfly Wolves are creatures that have the bodies of a wolf with the wings, tail and size of a butterfly.
/ / <--- about that wide and this long..??
The karner blue butterfly's height is the size of a nickel.
I think what you are asking is how do the different size of needles affect the type of stitches you will get when knitting. Basically, the larger the needles the larger the stitches. Also, if you use smaller needles, the fabric you create will be stiffer than if you knitted with a large set of needles.
Diabetic needles can be purchased from your local pharmacy. You will need a prescription from your doctor to allow you to purchase these needles. Your doctor will also tell you what size you need to purchase.
Methotrexate uses insulin needles.
The ball band on yarn often tells you what size needles it is suitable for.