Style G / Size 138 bobbins are typically used with topstitch threads that are size 207 and higher.
Size 138 - Style G bobbins are typically used in small and mid-sized commercial sewing machines for sewing garments, fabrics, leather, and upholstery. They are 0.390 inches (0.861 cm) high and 0.991 inches (2.187 cm) in diameter.
Information
Code Description Image Price Stock  
BOBG138BLAC144Pe Bobbins - Style G - Size 138 - Black (Eddington) - Polyester - Sideless - Box of 144 $50.00 6
BOBG138WHIT144Na Bobbins - Style G - Size 138 - White (A&E) - Nylon - Sideless - Box of 144 $70.00 18
BOBG138WHIT144Pt Bobbins - Style G - Size 138 - White (Service Thread) - Polyester - Sideless - Box of 144 $76.00 2
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Bobbin Styles 

Bobbins - Half Price

Bobbins - Style A / Type 15

Bobbins - Style G

Bobbins - Style L

Bobbins - Style M

Bobbins - Style U

Bobbins - Style 41

Bobbins - Style 58

Bobbins - Style D - Limited selection

Bobbins - Style F - Limited selection

Bobbins - Style MA - Limited selection

Bobbins - Style N - Limited selection

Bobbin Selections 

  

Bobbin Buying Guide

The Bobbin Buying Guide gives information needed to buy the right prewound bobbins.

Bobbin Style Guide PDF

Print templates for Styles A / 15, G, L, M, and U with precise U.S. and metric dimensions for visual matching.

 Machine / Style Reference Elna Kenmore Singer
A-1 Gamill Lewis Sunstar
Adler Handi-Quilter Mitsubishi Tajima
APQS Hinterberg Nakajima Thor
Babylock Homesteader Necchi Tin Lizzie
Barduran Ideal Pfaff Union Special
Bernina Innova Prodigy Viking / Husqvana
Brother Janome Reece White
Consew Juki Riccar ZSK
Durkopp Ken Quilt Seiko