Choosing the right unit size before you rent saves money and hassle. Too small and you'll be making extra trips or renting a second unit. Too large and you're paying for space you don't need. Here's a practical guide to the most common sizes and what fits in each.
9 sq ft locker — roughly the size of a car boot
Good for: a luggage set, a few small boxes, small electronics (laptop, speakers, external hard drives), or small appliances (toaster, kettle).
25 sq ft (5×5) — roughly the size of a large wardrobe
Good for: a single mattress, seasonal clothing and sports equipment, several medium-sized boxes. A popular choice for students or those clearing a single room.
50 sq ft — roughly half a single garage
Available as 5×10 (long and narrow) or 10×5 (shallower but wider). Good for: a double bed frame and mattress stored upright, entertainment unit, a few medium furniture pieces (bookshelf, sofa, small dining set).
75 sq ft (5×15) — enough for a one-bedroom flat
Good for: two double bed bases and mattresses (upright), larger furniture (wardrobes, lounge suite, dining suite), large appliances (fridge, washing machine, dishwasher), bicycles.
100 sq ft (10×10) — roughly the size of a single garage
Good for: two bedroom suites or one king-size plus one double, large lounge suite, dining suite for a large family. A comfortable size for clearing most of a two-bedroom flat.
125 sq ft — enough for a two-bedroom flat
Good for: two double beds plus a single, a range of furniture and appliances, large sports equipment (snowboards, skis, bicycles), garden tools.
150 sq ft (10×15) — a comfortable three-bedroom home
Good for: king-size and double bedroom suites, large furniture and appliances, garden and DIY tools, hobby materials. A full house clearance in one unit.
200–300 sq ft — specialist and vehicle storage
At this size, you're looking at vehicle storage — a small car, boat, jet ski, or large 4×4 — alongside household contents. Availability varies by facility, so check ahead.
One rule that applies to any size
Whatever you store, make sure your insurance cover reflects the full replacement value of the contents — not what you paid originally, and not a rough guess. If you're underinsured and need to claim, your payout will be reduced proportionally.
cover4storage policies start from £15 a year. Set your cover level to the full replacement value of your contents. Get a quote →
Once you've sized your unit, get it covered on our storage unit insurance page.