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).

  • We list all measurements including the jewellery gauge, length or internal diameter in the product description. We recommend visiting a Body Piercer for correct sizing but apreciate this isn't always possible. Therefore, it's easiest to use your current jewellery as a guide for sizing. To find out how to measure your jewellery, see our Measuring Guide. If you need any additional help, Contact us.
  • We are an official stockist of APP Approved Brands and can offer custom ordering of precious, semi-precious or synthetic gemstones in implant grade gold, steel and titanium from Anatometal, Auris, Industrial Strength, Junipurr, LeRoi & Neometal. Please head over to our Custom Jewellery Order Form for more information.
  • We offer Worldwide postage. All orders received by 12 noon Monday to Friday are sent the same day! We send all orders by Tracked Postage. For UK orders we use Tracked 48 or Next Day Delivery. Read our Delivery & Postage Policy for more information on shipping types and times.
  • Jewellery orders will arrive sealed in clear packaging. Returns are accepted providing the jewellery, hygiene seal and packaging are intact. Please read our Returns Policy for further information.
  • Purchasing for someone else? Our jewellery looks beautiful when presented in our branded Gift Box. Spend over £50 on a single item and you'll receive one for free!
Pouch Size
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.