A skein is a unit of length which has been used in the UK. As a measuring unit of cotton

yarn Yarn is a long continuous length of interlocked fibres, used in sewing, crocheting, knitting, weaving, embroidery, ropemaking, and the production of textiles. '' Thread'' is a type of yarn intended for sewing by hand or machine. Modern ...

or of

silk Silk is a natural fiber, natural protein fiber, some forms of which can be weaving, woven into textiles. The protein fiber of silk is composed mainly of fibroin and is most commonly produced by certain insect larvae to form cocoon (silk), c ...

, a skein equates to a "rap" or a "lea". One skein is equivalent to .

References

Units of length Customary units of measurement {{measurement-stub