Pick a size and see where it lands. This page does two things the product page will not: it works out which size actually fits your three measurements, and it tells you where the hem will sit on you.
It measures against the ease the garment was drafted with, not against an arbitrary minimum, which is why it sometimes recommends a size you were not expecting. The bands it uses are on the mathematics page if you want to argue with them.
Six numbers. Height and inseam decide where things land; the other four decide which size. Bust, underbust, waist and hip start linked to your height, like a real body — move one by hand to set it yourself, or reset it back.
Your measurements never reach a server. They are kept in this browser tab, which normally forgets them when you close it. A link you copy carries them inside it, so anyone you send it to can read them.
Each carries the ease it is actually cut with, and the cloth it is made from.
Size charts here are European ready-to-wear, grading four centimetres to a 44 and six beyond it. The ease figures are trade rules of thumb rather than a standard, and they vary by house — a brand that publishes its own garment measurements will always be the better number. Stretch is treated as lowering how much room a garment needs, not as room it already has. Where a figure is an estimate the page says so.