Pick up a cloth or plastic soft tape measure, that you can find at a craft and sewing stores. If you don't have a soft tape measure, you can get a piece of string and a ruler. To get accurate measurements, you need to strip down to your underwear or wear tight clothing like leggings.
You can find more detailed instructions on how to get measurements right here
Bust - Wrap a centimeter around the most volume and protruding part of the chest, exhale half and fix the volume of the bust;
Waist - Wrap a centimeter around the thinnest part of the waist, measure at half a breath. Do not retract or inflate the belly during the measurement;
Hips - It is measured on the most volume part of hips, approximately at the level of the hip joints;
Outseam - Standing straight, measure the distance from the groin to the bone at the ankle;
Shoulder width - Holding a centimeter in front of you, fix the distance from the base of the neck to the shoulder joint;
Arm hole - Measured around the arm at the most convex place at the level of the armpit;
Biceps - Measure the biceps in its widest area. When measuring, the tape should fit snugly (but without tension) to the body. The hand should be in a relaxed state;
Sleeve length - By stretching the arm halfway, or holding straight, but no bending, measure the distance from the shoulder to the wrist.
Feel free to contact us to get assistance with your measurements and picking the proper size