Autoclave Sterilisation of Jewellery

Isha Body Jewellery

Size Guide

We strongly recommend that initial jewellery worn in a healing piercing should be left in place or where required, changed by a licenced piercer only.   Changing jewellery at home using non-sterile jewellery, before the piercing has fully healed, can risk infection.  Please consult your piercer wherever possible.  

UK standard vacuum sterilisation, autoclaved at Isha Studio.  Each item will be sterilised in a paper pouch with a light blue window.  Unless damaged, the contents remain sterile, three years from when they were autoclaved.  Process date is detailed on each pouch.

Sterilisation is only available on jewellery purchased from Isha Body Jewellery that is of suitable hypoallergenic material: Implant/Medical Grade Titanium ASTM F-136, 14ct/18ct Gold or Niobium.  Other materials will not be sterilised (non-implant grade steel or glass).

Pouch Size

Collections: £2.50-£5.00

Size Chart


Gauge (G) / Post Thickness


Length / Internal Diameter

1mm = 18G 3.1mm = 1/8"
1.2mm = 16G 3.9mm = 5/32"
1.6mm = 14G 4.7mm =3/16"
2.0mm = 12G 5.5mm = 7/32"
2.4mm = 10G 6.4mm = 1/4"
3.2mm = 8G 7.1mm = 9/32"
4mm = 6G 7.9mm = 5/16"
5mm = 4G 8.7mm = 11/32"
6mm = 2G 9.5mm = 3/8"
8mm = 0G 11.1mm = 7/16"
10mm = 00G 12.7mm = 1/2"
12mm = 1/2" 14.2mm = 9/16"
14mm = 9/16" 15.8mm = 5/8"
16mm = 5/8" 17.4mm = 11/16"
18mm = 11/16" 19mm = 3/4"
20mm = 13/16" 20.6mm = 13/16"
22mm = 7/8" 22.2mm= 7/8"
See how and where to apply these measurements on our handy pictorial guide.