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Needle Conversion Chart Shows conversion between current and past US and European knitting needle sizes. Yarn Weight and Gauge Chart Recommended needle and crochet hook sizes used to achieve gauge with various yarns.
However, the term gauge, abbreviated G or ga, typically refers to the Birmingham gauge for hypodermic needles. [1] The French scale measures and is proportional to the outer diameter of a catheter, with 1 French (Fr) defined as 1 ⁄ 3 millimeter, making the relationship: 1 mm = 3 Fr.
The Birmingham gauge ranges from 5/0 or 00000, the lowest gauge number corresponding to the largest size of 0.500 inches (12.7 mm), to 36, the highest gauge number corresponding to the smallest size of 0.004 inches (0.10 mm).
Scoop (utensil) sizes, numbered by scoops per quart; Thickness of leather is measured in ounces, 1 oz equals 1 ⁄ 64 inch (0.40 mm). [30] Bolts and screws follow the Unified Thread Standard rather than the ISO metric screw thread standard. Knitting needles in the United States are measured according to a non-linear unitless numerical system.
The Craft Yarn Council of America (CYCA), an industry trade association, has collated a table of crochet hook and knitting needle sizes from de facto industrial standards and elicited the cooperation of its member organizations in adopting them to regularize sizing in the United States. The listed gauge systems are also widely used internationally.
Changing yarn weight or needle size can have a significant impact on the finished project, so standardized systems have been spread about, as well as conversion systems for regional standards (especially needle sizes). [1] Yarn weight is important in achieving the correct gauge or tension for a particular project and can help with yarn ...
In the current US system, things are opposite, that is, smaller numbers indicate smaller needles. There is an "old US system" that is divided into standard and steel needles, the latter being fine lace needles. [4] Occasionally, older lace patterns will refer to these smaller needles in the old measurement system.
Most sewing machine needles will have packaging that gives both of these numbers in its size description — (e.g. as either 100/16 or 16/100). The length of all sewing machine needles has been standardized and does not require a separate code. The metric designation is the actual needle diameter in hundredths of a millimeter. [3]