"XX weight" usually refers to cotton threads and is based on the cotton count 
of the number of 840 yard hanks obtained from 1 lb of fibres.  Linen threads 
are usually measured by the number of 300 yard hanks obtained from 1 lb of 
fibres.  Thus a number on a reel of linen thread is likely to be 2.8 times 
higher than the number on a reel of the "same size" cotton thread.

Modern sewing machine cotton (for ordinary sewing together of pieces of fabric) 
is generally 50/3 cotton count - or 32 wraps/cm.  There aren't any 3 ply linen 
threads as fine as that - Fresia 100/2 and Bouc 90/2 are the nearest (if they 
are still available) and anything much finer is like hens' teeth!  

Brenda

On 27 Jan 2013, at 01:57, Susan Reishus wrote:

>  The "33" weight sounds quite thick---"45" might be more
> tolerable as many standard sewing threads are nowadays in the 50 range.  And
> then some threads are given a wt. that varies considerably, also.  As I
> mentioned, handkerchief linen typically requires 80 (and often 90) thread.

Brenda in Allhallows
www.brendapaternoster.co.uk

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