Jewelry Sizing Guideline. Something helpful to follow is LMK's jewelry guide for general sizing to help you determine a custom length or size you need.
CHILDREN'S STANDARD BRACELET AND NECKLACE SIZES
Bracelets 5"- 6"
GENERAL CHILDREN RING SIZING:
Ages 2-3 : Size 2
Age 3-5 : Size 3
Age 6-8 : Size 4
Age 8-9 : size 5
Age 10 + : Size 6
(Please note these are general sizing and that to get most accurate sizing please have fingers measured or sized at a jewelry store)
WOMEN'S STANDARD NECKLACE SIZES
16" Choker length
17-18" Will reach the collarbone
20" A few inches below collarbone
22" At or above neckline
24" A little Below the neckline
30" Below the chest
Choose the next size up for larger neck sizes.
MEN'S STANDARD CHAIN SIZES
18" Base of the neck -for smaller neck sizes
20" To collarbone -The most common length for the average size man
22" A few inches below the collarbone
24" Just above the sternum
STANDARD BRACELET SIZES
7" Average woman's wrist
8" Average man's wrist or woman with larger wrist
9" For man with larger wrist
If you can measure for bracelet length, I suggest using a measuring tape if not get a string wrap around wrist than measure with a ruler. Typically you want to go 1/2" longer than what your wrist measure for a bracelet.