R.G. Hardie provide premium quality black wool glengarries to pipe bands worldwide. The glengarry come complete with red bobble. Measurements should be taken round the head where the bottom of the hat will sit. Hat Sizing Chart * Head Circumference Adult Hat Size Inches Centimeters Fitted Easy Fit 21 1/4 54 6 3/4 Small (S) 21 5/8 55 6 7/8 22 55.9 7 Medium (M) 22 3/8 56.8 7-1/8 22 3/4 57.8 7-1/4 Large (L) 23 1/8 58.7 7 3/8 23 1/2 59.7 7 1/2 XL 23 7/8 60.6 7 5/8 24 1/4 61.6 7 3/4 XXL 24 5/8 62.5 7 7/8 25 63.5 8 *These charts are for reference only. Fit may vary depending on the construction, materials and manufacturer. Head Circumference Children's Hat Size Inches Centimeters Fitted Easy Fitted 18 1/2 47 19 48 6 XSM 19 3/8 49.2 6 1/8 S 19 3/4 50.2 6 1/4 20 1/8 51 6 3/8 M 20 1/2 52 6 1/2 20 7/8 53 6 5/8 L 21 1/4 54 6 3/4 21 5/8 55 6 7/8 XL 22 55.9 7 *These charts are for reference only. Fit may vary depending on the construction, materials and manufacturer.