Put a straight edge under the armhole. It is likely that finished sleeve length will be shorter than the body measurement below.

Standard Body Measurement For Sewing Kids Clothes Kids Newborn To 12 Years Clothing Size Chart
Armhole body measurement. The armhole depth refers to the measure from the back nape of neck to the bust line. 3 another method is to measure the body on the back from the nape point to the chest line just under the arm. From 25cm under armpit to waist. Measurements for drafting the bodice back block bodice back sloper there are 11 measurements needed to draft the bodice block back. Standard measurement sizes in inches. 4 the next method is to take the bust round in inches.
This is taken according to the bust round or as per the measurement you have made on the bodyyou can use easy calculation of bust round8 35 inches for this measure. Sleeve length is a body measurement. Finished pattern measurement for sleeve length will be impacted by sleeve cap height. People with identical bust and over bust measurements often fit into the same size and style pattern differently see same measurements very different figures. Waist measure your waist at the smaller circumference of your natural waist usually just above the belly button. Add the two measurements together to get your full arm hole measurement.
Tie a piece of elastic around your upper bust and measure from the shoulder point to the elastic side length. Upper arm measure around the widest section of the upper arm located above the elbow. Here is the small of the corcoran 20 and you can see the armhole depth is 7 14. A persons body measurements may differ from standard body measurements because of height weight profession posture growth physical abnormality etctherefore it is advisable that you consider these factors and make adjustments at the time of cutting. If the front seam was 7 1 4 cm 29 in and the back seam was 7 1 2 in 19 cm your final arm hole measurement would be 14 3 4 in 37 cm. The shape of your body depends on where you carry your flesh and dictates the shape of an armhole.
From this measure the slope of the shoulder should be reduced. Some general guidelines for taking body measurements. Half of that will be your armhole measurement. A muslin is the testing ground its the perfect place to sort out fit issues. Measure from the shoulder where the sleeve is seamed into the sweater straight down. This is a finished garment measurement that is your body measurement ease.
Almost everybody faces this problem before we start i assure you that it is not that people like you and me stitching for fun types face this problem of armhole and sleeve cutting. Even the most skilled ones and professionals also face this problem while cutting sleeves. That is because some of us may have substandard body measurements or may have some deformity. From shoulder point to upper bust. Armhole depth measure from the top outside edge of the shoulder down to the armpit. All you have to do now is use basic math to find the sum of the pair of numbers you just wrote down.
All measurements in inches and do not include ease. Hip measure at the widest part of your lower hip. The biggest mistake knitters make is in measuring their body.