How To Measure Remember to keep the measuring tape comfortably loose. Bust: Measure around your body, under your arms and over the fullest part of your bust. Waist: Hold measuring tape at your natural waistline. For a baggy fit, add 2" - 4" to waist size. Hips: Measure around the fullest part of your body. | | | | | | | | Hat Size Chart Hat Size | Approximate Measurement | Small | 57cm | Medium | 58cm | Large | 59cm | | | Small/Medium | 57cm | Medium/Large | 58cm | Large/X-Large | 59cm | | | SIZE | SM | MD | LG | XL | | AGE (months) | 0-6 | 6-12 | 12-18 | 18-24 | | CHEST (inches) | 16 1/2 | 18 | 19 1/2 | 20 1/2 | | WEIGHT (lbs) | 7-15 | 16-22 | 23-27 | 28-30 | | LENGTH (inches) | 17-24 | 25-28 | 29-31 | 32-34 | | SIZE | 2T | 3T | 4T | 5T | | CHEST (inches) | 19 1/2 | 20 1/2 | 22 1/2 | 24 | | LENGTH (inches) | 14 1/2 | 15 | 15 1/2 | 16 | |