This is a Sashiko Ring Thimble which you can use when making long running stitches using long Sashiko Needles. The ring thimble is used on the middle
Metal Sashiko Palm Thimble – Snuggly Monkey
Clover Adjustable Ring Thimble With Plate – Sewfinity
Palm Thimble for Sashiko – Brooklyn Haberdashery
Clover 611 Adjustable Ring Thimble with Plate, 22 India
2pcs/set Silicone Thimble Hollow Breathable Antiskid Thimble Handmade Needlework Finger Protector DIY Sewing Tools sewing - AliExpress
Designed for long-running stitches using a long needle or Sashico.One size fits all.
Adjustable ring thimble with plate for Sashiko
DIY Sashiko thimble making (Part 2) with a metal covered button
Clover Adjustable Sashiko Palm Ring Thimble —
Adjustable Ring Thimble with Plate
How to Sashiko Stitching Using a Sashiko thimble [Sashiko Tutorial]
Clover Adjustable Ring Thimble – Miss Maude
This is a finger thimble which you can use when hand sewing or Sashiko stitching with short needles. The finger thimble can be used on any finger to
Finger thimble | One size fits all
DIY Sashiko thimble making (Part 2) with a metal covered button
Adjustable Knuckle Sashiko Thimble – Snuggly Monkey