Closure Type: No closure. Stretch. Just slip them over your wrist.
Measurements: Approximate. Obsidian bracelet is 2.50 inches in diameter without stretch and Black Onyx bracelets are a little over 2 inches in diameter. Entire set measure .75 inch wide. Recommended wrist range up to 7.50 inches. 31 grams total weight.
Please note that Fram is making ongoing changes to their packaging to reflect the new name "Extra Guard". Regardless of whether box received displays "Extra Guard" name or not, the filter inside has not changed.