How to shop for clothes online (without having to send everything back)

As the summer sales start, the Guardian’s stylist gives her tips for buying clothes online – from measuring heel heights to working out what size bag you actually needThe summer sales start this week, but shopping online – and not being able to try on clothes before you buy them – can feel like one of modern life’s annoyances. Dresses are too short, trousers are too long, and fabric is so sheer that you can see your underwear through it; seconds after your package h