Where is the size chart?

Two places:

• On the product page: the size guide link next to the size selector opens the chart that applies to that product.
• On the size guide page: the measurement ranges and how to measure, in one place.

Both are fed from the same source, so the chart on a product page and the one on the guide page never disagree.

Does it differ between products?

It can. Corsets, bustiers, garter sets and harnesses are cut differently and some are designed to sit tight to the body. Checking the chart on the specific product page is more reliable than settling on one size across the catalogue.

Product descriptions flag this: wording such as "fitted", "stretch" or "adjustable" changes how much tolerance there is. Adjustable straps and multi-hook closures forgive more than a fixed cut.

Conversions between EU, UK and US sizing vary by garment type, so use the centimetre ranges rather than converting a letter you usually wear.