Size 120 VERY THICK Groz-Beckert brand needles for a Willcox & Gibbs straw hat chain stitch machine. See other listing for size 90. Will work on other machines that use the same type of needle with a groove that is all the way up the shank of the needle.
If you are doing regular sewing then purchase the size 90 needles, these are specialty large needles and will leave large holes in fabric. These would be used for straw hat making Willcox & Gibbs sewing machines.
Measurement from top of needle down to top of eye is 28mm, top to tip is 32mm.
Listing of the size 90 needles is here:
https://www.etsy.com/listing/250416284/size-90-willcox-gibbs-chain-stitch?ga_order=most_relevant&ga_search_type=all&ga_view_type=gallery&ga_search_query=willcox%20&%20gibbs%20needles&ref=sr_gallery_4
Pack of 10 needles
These size 120 needles are comparable to the old Willcox & Gibbs size 6.
The size 90 needles are comparable to the old Willcox & Gibbs size 3.
To insert in machine slip point of needle down into needle hole, hold with long groove on left side and slide needle up most of the way on the shank then re-tighten needle clamp with the special Willcox & Gibbs needle wrench. If you are missing the needle wrench substitute with a 9/32 inch open ended common wrench.
I have a manual with extra information for a Willcox & Gibbs Automatic chain stitch machine available as an instant download PDF file here:
https://www.etsy.com/listing/242311777/willcox-gibbs-manual-pdf-file-for-chain?ga_order=most_relevant&ga_search_type=all&ga_view_type=gallery&ga_search_query=willcox%20&%20gibbs%20manual&ref=sr_gallery_1
2nd photo is chain stitch sample on white wool and DMC variegated tatting thread, done on 1903 Willcox & Gibbs chain stitch machine with stitch set to largest, size 12. Not included.
3rd picture is a Willcox & Gibbs chain stitch treadle sewing machine