No one ever thought that a few centuries ago such a thing as clothing size simply did not exist. If at the dawn of mankind, leaves, animal skins served as outfits, then over time, fabrics appeared, thanks to which people began to create clothes, and then learned to pick things up according to the figure. But anyway, no one could even imagine that clothes can have parameters that are called, for example, size M. Only rich people who hired tailors could afford clothes, and this or that thing was created according to individual measurements. The first impetus for creating clothing sizes was the Napoleonic Wars. Judging by historical information, in order not to distract his soldiers from military operations, the emperor ordered that his troops begin to sew clothes in large quantities.
Today, for ease of choosing clothes, there are many different tables, where the main sizes of clothes are displayed in the ratio of height and volume. Basically, these are alphabetic or numeric designations. It has become much easier to choose clothes, knowing at the same time what size - M, L, or S - will suit you. So,The main sizes are: XS, S - this clothing size is suitable for the smallest and thinnest people. Size M is considered the golden mean. Sizes L, XL, XXL, XXXL are suitable for men and women with large volumes.
It is important to know that the designation of sizes also depends on the country of residence. So, in the main tables, American, European, international and Russian sizes are most often given. Methods for measuring parameters are also different everywhere. So, in the CIS countries, it is customary to consider the half-girth of the chest as their size. For example, the chest circumference is 90 cm, so your size is 46, according to the international table - M-size. But the difference between Russian and European sizes is 6 cm. For example, European size 40 is our 46.
There are also such American tables where, for example, the size SM, MD, LD is present. Their parameters are slightly different from ours, since our sizes 42, 44 and 46 correspond to these sizes. Someone, seeing the designation SM on clothes, might think that this is a combination of parameters in the American table: size M plus size S. This is not at all so. Do not confuse.
To know your exact size, you need to measure your height, bust, waist and hips. Growth is usually measured as follows: they stand exactly near the casing, doors, walls and other flat surfaces, the back of the head and heels should be on the same line. Leave a pencil mark where the head ends. Then we measure with a measuring tape. Here is your height. But please note that for clothes (women's) usually choose height 170 cm +/-3 cm. Therefore, it is much more difficult for girls with small stature to choose clothes that would immediately fit them in height. Very often, it is precisely such miniature people who, after buying, also have to adjust products to fit their height.
As for the measurement of the circumference of the chest, it is worth doing it without a bra, so as not to make a mistake in the calculations. The main thing is not to pull the centimeter tape too tight, but also do not let it in. The belly and hips should also be measured without additional clothing to find out your true size range.