Inner diameter: 3"
Outer diameter: 3.625"
If you are making a double layer sling, turning a baby wearing wrap into a sling, using a heavy weight (winter weight) or heavy nap fabric, or a very wide fabric (34"-45"), or have just had difficulty adjusting your sling in the past, you may want our large size rings.
For more information: www.slingrings.com
This is for the pair of grey (Left row, middle).