SpareParts Theo Harness Size Guide

Which size Theo™ is for you?  
Start with measuring for the perfect fit.
For Theo™ you will need to consider Belt measurements (hips), groin measurements to determine which Theo™ will produce the best fit for you, or your partner. 

Theo™
BELT


THONG STRAP
SIZE A
20 - 50 inches
50.8 - 127 cm
13 - 18 inches
33 - 45 cm
SIZE B
35 - 65 inches
88.9 - 165 cm
21.5 - 27 inches
55 - 68 cm

 

SIZE A or SIZE B:
Follow these simple steps to determine which Theo™ product will fit you perfectly!
To determine if you or your partner is a size A or B, you will need to consider both the Belt and thong strap measurements.

MEASURING FOR THE BELT:
Step one
To measure which size is best for the wearer; first consider where you will be wearing it whether it’s on your waist (high ride) or on your hips (low ride).
If you prefer to wear your harness high, instead of low (please be aware many wearers like to wear their harness low as they want it to sit 
on their clitoris so it allows for stimulation where ever possible); measure around your waist instead of your hips.
 
Step two
Wrap the measuring tape around your hips (or waist if applicable), where you would wear your belt. Take the number where the tape 
measure completes and crosses over itself.  You should add a few (3-4) inches to this measurement for size fluctuation and room for 
sizing adjustment.  Take the measurement and see size chart above for Belt and determine which belt would be best.  
(You should be able to select a size that is reflective of your belt size.  So for example:  if you wear a size 32 belt, and it has a 
good fit with a couple holes for adjustment, you should select the Joque that best fits 32 inches).

MEASURING FOR THE THONG STRAP:
Step one
To measure which size is best for the wearer; first figure out where you will be wearing it on your hips (or waist if applicable).  
The best way to do this is to put on a regular belt, as this will help you to have a place to start and finish measurement on the next step.
 
Step two
Next you should take your tape measure and start by taking the end of it and holding it in the center of the belt (in line with your belly button).  
Slide the measuring tape between your legs.  You want to stretch the measuring tape straight and taught to the center of the back of the belt (around 
where your tail bone is).  
 
Take the measurement, and then subtract 7 inches, this should give you the length of leg strap you need for the harness to fit securely but still be comfortable.
See size charge above Thong Strap.


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