Buying lady's plus size clothes, hosiery and lingerie from other countries can can be a challenge but once you are able to convert your size you will open up endless possibilities, being able to shop internationally online.
This international women's plus size guide will give you an idea of what size to look for when buying clothes from abroad, but as sizing varies considerably even between brands from the same country, you must check the measurements given by the manufacturer.
You need to take into account that European sizes, French and Italian for example can be less generous than UK, US and Australian ones, particularly on the hips (so you must be particularly careful when purchasing bottoms, like leggings, skirts or pants).
Also finding clothes in larger sizing 5x and over from those countries will be very difficult. Italy being the home of so many fantastic fashion designer, is a big let down, as plus size brands and very few, and normally go up to size 54 or 56 (US 3x).
UK and US offer the best choice, particularly for bigger sizes 4x, 5x, 6x, 7x and over. The UK plus size scene is very vibrant, with a number of specialist retailers, normally stocking up to size 32 (5x), now catering for all ages including the younger markets.