Whether for 'fashion', 'fun' - or just plain comfort, its handy to have a 'map' of necklace lengths that can be kept at your workbench, for quick reference. Even handier, it's sized to fit on a 4" x 6" index card. You may want to print two copies - one for a card, and the other as 'backup', to copy, when the card becomes too dog-eared to read!
Print the chart below.
Glue it to a card.
Keep it handy in your tool box as an instant reference for making necklaces of Any Length - Any Combination - Any Time!