Bobbins by class

The best bobbins and bobbin cases for 2026

Bobbins look interchangeable and are not. We cover the classes (15, 15J, L, M), metal against plastic, and why a bobbin that is a fraction of a millimetre wrong produces tension faults that get blamed on the machine.

What we recommend

1. 

   Singer Class 15 Metal Bobbins

   The commonest domestic bobbin class, in metal. Present on all six markets, with a separate US reference.

   Class

   15

   Material

   Metal

   Amazon reference

   B0BCWPFFH1 in Europe, B07N9TX689 in the US

   • Class 15 fits a very large share of domestic machines
   • Metal bobbins do not deform, so the thread pays out evenly for years
   • Class 15 and 15J look identical and are not interchangeable

   ≈ $16 / 10 €

   Check price on Amazon
2. 

   Bernette Bobbin Set for b70 / b77 / b79

   Manufacturer-matched bobbins for the Bernette b-series and Chicago machines. One reference on every Amazon store we checked.

   Contents

   10 bobbins

   Fits

   Bernette b70, b77, b79, Chicago 5 and 7 (manufacturer)

   Amazon reference

   B0DYKW564R (all six markets)

   • Manufacturer-matched, so no guessing at class or height
   • One reference on all six markets
   • Only useful if you own one of the listed machines

   ≈ 16 €

   Check price on Amazon