Big fish, little fish, cardboard box

If you know, you know. But did you know that those catchy dance moves can also double up as a surprisingly good way to explain InPost Locker sizes? 

Okay, hear us out... 

At InPost, we’re all about making sending and receiving parcels simple, speedy, and secure. But with four different locker sizes, you might be wondering - what actually fits where?

Well we’ve got your ultimate size guide, from the mini but mighty Extra Small to the seriously spacious Large. All our compartment sizes have a weight limit of 15kg so please don’t post anything heavier. 

Let’s break it down:  

🐟 Extra Small (XS) – 4cm x 23cm x 40cm 

The little fish. 

Think letterbox luxe. These mini but mighty compartments are perfect for small items that deserve big love. 

✅ What fits: 

• A paperback novel or slim journal 

• A new sunhat or bikini (summer mode: activated) 

• Jewellery in a presentation box 

• A phone case or slim tech accessory 

⚡ Top Tip: Not all our lockers have XS compartments just yet, but if you spot one - use it! They’re perfect for those little things that don’t need a big box or a trip to the Post Office. 

📦 Small (S) – 8cm x 38cm x 64cm 

The cardboard box, if you will. 

This size is your go-to for everyday bits and bobs. 

✅ What fits: 

• A folded hoodie or t-shirt 

• A small board game 

• A pair of trainers 

• A box of fancy teas 

• Skincare sets or a bundle of beauty bits 

Think of small compartments as your parcel’s equivalent of a roomy handbag - deceptively spacious. 

🐠 Medium (M) – 19cm x 38cm x 64cm 

The big fish. 

When your items start getting bulky, Medium’s got your back. 

✅ What fits: 

• A shoebox with boots 

• A chunky jumper or coat 

• Your new dressing gown 

• Homeware like candles or small kitchen gadgets 

Basically, the kind of stuff that gets you excited when the parcel arrives. 

🐋 Large (L) – 41cm x 38cm x 64cm 

The bigger fish. 

✅ What fits: 

• A winter coat with all the fluff 

• A large board game or puzzle set 

• Multiple clothing items in one package 

• A stack of books or notebooks 

• Kitchenware like a set of utensils or Tupperware 

• Your mum’s “just sending you a few things” box that’s actually massive 

If it’s big, bulky, or you need to cram in some serious cushioning, this is your size. 

🎯 Why XS deserves the spotlight 

Sure, Large gets all the oohs and aahs, but we’re here to show Extra Small some love. It’s ideal for: 

• Side hustlers sending handmade jewellery 

• Online sellers shipping accessories 

• Little love notes with a gift inside 

• People who hate wasting packaging 

Plus, it’s sustainable, cost-effective, and super convenient -less packaging, and less waste. What’s not to love? 

🔍 Spot the XS! 

Next time you use an InPost Locker, keep your eyes peeled for those XS compartments. If you’ve got something small, pop it in and enjoy the smug satisfaction of choosing the perfect fit. Gold star for you. 🌟 

So whether you’re a big fish, a little fish, or somewhere in between, there’s a compartment waiting just for your parcel. And yep… it might even be a cardboard box.