Picnic Blanket Size UK — What Do You Actually Need?

Choosing the right picnic blanket size in the UK is harder than it should be — every brand says "generous" or "family-sized" without ever telling you what that actually looks like on the ground. What none of them tell you is what that actually looks like with real people, real food, and children who have their own ideas about personal space. This is the honest version.

What does 150 × 150cm actually look like?

It helps to have a reference point. 150 × 150cm is roughly the size of a large coffee table — or two bath towels laid side by side. It's a generous square, but it's not enormous. Unfolded on the grass with nothing on it, it looks perfectly spacious. Add four people, a picnic bag, some shoes, and a toddler who has decided to lie diagonally across the middle, and it fills up faster than you'd expect.

That's not a criticism — it's just the reality of any picnic blanket at this size. Knowing what to expect before you arrive at the park is more useful than a vague promise of "family-sized."

What size picnic blanket do you need for a UK family?

Here's the honest breakdown by group:

A couple — comfortably. Plenty of room for two people, a spread of food, and space to stretch out. This is the size at its best.

Two adults and a baby or toddler — easily. Young children take up surprisingly little space when they're sitting still, which admittedly is not always.

Two adults and two young children — yes, with a bit of negotiation. Everyone fits, the food fits, and there's room to sit comfortably around the edges. It works well.

Two adults and two children aged 8 and over — tight. Older children take up adult-sized space, and the blanket starts to feel like a game of Tetris once the food is out. Manageable for a short afternoon, less comfortable for a long one.

Four adults — possible around the edges with food in the middle, but you'll feel the boundaries. Fine for a lunch, less relaxed for an afternoon.

A group of five or more — bring two blankets.

What happens when children are involved?

Children have a relationship with picnic blankets that defies geometry. They start sitting. They become horizontal. They roll to the edge. They sprawl. They invite the dog onto the blanket and then complain there's no room. By the time everyone has settled, the blanket that looked perfectly generous at home is somehow entirely covered.

This is not a size problem — it's a children problem, and no blanket solves it entirely. What helps is having something for them to actually do on the blanket rather than simply occupy it. Our colouring picnic blankets are the same 150 × 150cm size as the printed collection, with black and white illustrations children colour using washable markers. A child who is colouring is a child who stays in one place — which is its own kind of magic on a sunny afternoon.

Is a larger picnic blanket always better?

Not necessarily. A blanket that's too large to fold and carry comfortably is a blanket that stays at home. The point of a picnic blanket is that it goes with you — to the park, the beach, the garden, the boot of the car. Something that folds to a manageable size and doesn't weigh a lot is more useful than something that technically fits six but requires its own bag to transport.

150 × 150cm folds to roughly the size of a folded jumper. It fits in a tote bag, a rucksack, or the side pocket of a pushchair. That portability is part of what makes it the right size for most families — not the maximum possible, but the most practical.

What if you genuinely need more space?

Two blankets. It's a simpler and more flexible solution than one very large blanket, and it comes with an unexpected benefit: you can arrange them however the space requires. Side by side for a long table-style spread. At right angles for an L-shaped setup. One for the food, one for the people. Two different prints that look deliberately styled rather than accidentally mismatched.

For specific requirements — a large garden table, an event, or an unusual space — we occasionally produce bespoke sizes on request. Drop us a message if you have something particular in mind.

Does size affect how the personalisation looks?

It does, and it's worth thinking about. On a 150 × 150cm blanket, initials have room to breathe — they sit within the print rather than competing with it, sized and positioned to feel like part of the design rather than stamped on top. A very small blanket can make initials feel crowded. A very large one can make them feel lost.

150 × 150cm is the size where personalisation works best — enough surface for the print to do its thing, enough space for the initials to land properly. Up to five initials at checkout — a family monogram, a couple's letters, or a single initial that belongs to someone specific.

Ready to find the right one?

Browse the full collection of personalised waterproof picnic blankets — soft florals or bold patterned geometric prints, all 150 × 150cm. Add up to five initials at checkout. All cotton-top, all waterproof-bottom, all handcrafted in London. Free delivery on orders over £60.

Looking for more? Explore the full Petiotes collection — from personalised wash bags and cushions to handcrafted Christmas baubles, all made in our London studio. Every piece can be personalised with initials to make it uniquely theirs.