This 100% cotton accessory will be essential for you.
They have a round shape and a fairly thin diameter.
Measure your old laces to know the right size and thus make the right choice.
We can also tell you this as an indication:
the 45 cm will be suitable for shoes with 2 eyelets, the 60 cm for 3, the 75 cm for 4, the 90 cm for 5/6 and the 120 cm for 6/7 holes.