PI-WIKI-ANA-09 · Applied Anatomy · reviewed 2026-10-31

Biometry, Anthropometry & Jewelry Sizing

Critical numbers

Heal Room Buffer, Soft Tissue20–30% of resting tissue measurement

Heal Room Buffer, Oral Sites40–50% of resting tissue measurement

Heal Room Buffer, CartilageAbout 15-20% of resting tissue measurement

Initial Jewelry MaterialsTitanium ASTM F136 ; steel ASTM F138 / ISO 5832-1 ; BioFlex® body jewelry; Bioplast^{[1, 2]}

Initial Labret Length (lip)8–10 mm typical

Healed Labret Length (lip)6–7 mm typical

Initial Tongue Bar Length16–22 mm (anatomy-dependent)

Healed Tongue Bar Length14–16 mm typical

Initial Nostril Post Length7–8 mm

Healed Nostril Post Length5–6 mm

Initial Navel Bar Length10–12 mm vertical

Healed Navel Bar Length8–10 mm vertical

Using a single "standard" initial jewelry length for all clients at a given site
Prioritising client aesthetic preference over heal room requirements
Not scheduling a downsize appointment
Incorrectly measuring tissue depth by compressing tissue with the caliper
Using rings as initial jewelry for cartilage
Not accounting for anatomy-specific variation

European Union — EU Medical Device Regulation (MDR) 2017/745
United States — FDA: body jewelry has no medical purpose and is not regulated as a medical…
ASEAN & Asia-Pacific — Thailand