Medium - Inner diameter: 2.5" Outer diameter: 3" If you are using a medium or dress weight fabric, in widths of 26 "-30", you might be more comfortable with the medium size rings. In general, the medium size rings will give you a sling that is secure, but may not be as easy to adjust as the large rings if your fabric is on the thicker side. Many people prefer medium rings when making a single-layer dupioni or shantung silk sling, especially if it will be machine-washed.
Large - Inner diameter: 3" Outer diameter: 3.5" 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.
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