Pop Socks: The Complete UK Guide for 2026 (What They Are & How to Wear Them)

If you grew up in the UK, you probably know them as pop socks. Elsewhere they go by knee highs, half stockings or trouser socks — but they all mean the same thing: a sheer, stocking-style sock that ends just below the knee. They give you the polished look of tights on the part of the leg that shows, without the faff of a full pair.

What exactly are pop socks?

A pop sock is essentially the bottom third of a pair of sheer tights, finished with a soft elasticated band that holds it up on its own. Most are 15–20 denier — sheer enough to look like bare skin or fine hosiery — though opaque, patterned, fishnet and lace versions have joined the family. The name is thought to come from how easily they "pop" on and off compared to tights.

Pop socks vs knee high socks: what's the difference?

Technically, pop socks are the sheer, hosiery-style subset of knee high socks. If it's made of fine 15–20 denier yarn and looks like a stocking, it's a pop sock. If it's knitted cotton, wool or bamboo, it's a knee high sock. In practice UK shoppers use the terms interchangeably — and our knee high collection includes both.

How to wear pop socks in 2026

Under trousers and wide-leg jeans: the classic use. A sheer pop sock covers the ankle that shows when you sit or walk, keeps you cooler than tights, and nobody knows it's not hosiery. This is why they're also called trouser socks.

With loafers and flats: a barely-there 15 denier pop sock stops shoes rubbing without ruining the bare-ankle look.

On show, with skirts and boots: 2026's runways made visible knee highs a statement again. Patterned pop socks — dots, tulle, small florals — peeking out of ankle or knee boots turn a basic outfit into a considered one. Start with black dotted or fishnet pairs if you're new to the look.

Sizing and fit

Nearly all pop socks are one-size-fits-most (roughly UK shoe 4–7), thanks to highly elastic yarns. The thing to check is the cuff: a good pop sock has a wide, soft band that stays up all day without leaving a pressure ring on your calf. Between sizes or unsure? See our size guide.

Caring for pop socks

Treat them like tights: hand wash or use a mesh laundry bag on a cool cycle, no tumble drying, and keep them away from rough velcro and jewellery. Sheer pairs are delicate by nature — at a few pounds a pair it's worth keeping two or three in rotation.

Where to buy pop socks in the UK

We stock one of the UK's largest ranges of pop socks and knee highs from Penti and Italiana — from the classic Penti sheer knee high pop socks and 15 denier dotted knee highs to fishnet, tulle and patterned styles. Browse the full knee high socks & pop socks collection — every order ships free, worldwide. Prefer something shorter? Our ankle socks use the same sheer yarns.