Find the widest part of your arm. Wrap the tape around and measure from front to back.

How To Measure Your Size For Your Custom Dresses Lunss
Body measurement bust arm length. Chestbust measure around the fullest part of the chestbust. Finished pattern measurement for sleeve length will be impacted by sleeve cap height. It is likely that finished sleeve length will be shorter than the body measurement below. Wrap the tape measure around the widest part of your upper arm from front to back and around to the start point. Place one end of the tape measure at the fullest part of your bust and wrap it around your body to get the measurement keeping the tape parallel to the floor. A japanese dress marked 13 y pp or 13 y p would be designed for someone with an 89 cm bust and 89 cm hips while a dress marked 13 b t would be targeted at a taller individual with 105 cm hips but the same 89 cm bust.
Back waist length measure from the most prominent bone at base of neck to the natural waistline4. Wrap it around the fullest part of your bust continue under the opposite arm pit over your back until you reach the start point. Measure loosely around your natural waist. Get help for this one because its hard to do yourself. The b fitting adds 12 cm and the t height modifier 4 cm to the base hip measurement 89 16 105 cm. Bust length measure from shoulder to bust point.
Your natural waist will be between your belly button and your rib cage usually your natural waist is in line with your elbows. Position one end of the tape under your armpit. Center back neckto wrist with arm straight measure from back base of neck across shoulder and along arm to wrist3. Additionally there are a set of age based waist adjustments such. Donot take this too tight shoulder to shoulder this is measured from shoulder bone on one side to the oth er side shoulder bone. Place your hand at your waist your elbow should be bent at a 90 degree angle.
Neck round measure around the base of the neck slightly loose. All measurements in inches and do not include ease. Do not draw the tape too tightly. Cross back measure from shoulder to shoulder. Place one end of the tape measure at the center of your chest. Sleeve length is a body measurement.
For bra fittings an additional measurement is needed. What you should measure chest or bust. This measurement is used for tops and dresses. Relax your arms at your sides measure the fullest part of your bust keeping the tape parallel to the floor.