Shipping Container Size Comparison Guide
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Choosing the right container size depends on space, storage needs, and delivery access. With options from compact 6ft units up to large 45ft models, it helps to understand how each size works, what it stores, and which sites suit each option. This guide compares all major shipping container sizes, explains the differences, and helps you decide which one fits your project.

Shipping Container Size Comparison Guide

Table Comparing All Container Sizes

Below is a simple comparison of the most common UK container sizes. Measurements vary slightly by manufacturer, but these are standard guidelines.

6ft Container

  • External length: around 1.8m
  • Internal capacity: small tools, boxes, and small site kit

8ft Container

  • External length: around 2.4m
  • Internal capacity: tools, event kit, stacked boxes

10ft Container

  • External length: around 3.0m
  • Internal capacity: machinery, materials, retail stock

20ft Container

  • External length: around 6.06m
  • Internal capacity: up to 10 pallets, large equipment

30ft Container

  • External length: around 9.1m
  • Internal capacity: up to 14–15 pallets, long materials

40ft Container

  • External length: around 12.19m
  • Internal capacity: up to 20–22 pallets, bulk storage

45ft Container

  • External length: around 13.72m
  • Internal capacity: longest internal length, large commercial loads

For recognised measurements, you can check ISO size references from the official standards body.

If you want to read individual size guides, you can use Unit Group’s container pages such as 20ft shipping containers or 40ft shipping containers.

Key Differences Between Container Sizes

Each size offers unique advantages depending on your storage needs and site layout.

6ft and 8ft Containers

These compact models suit tight areas, homes, small trade jobs, and small worksites. They offer simple tool storage and fit almost anywhere. Good choice for restricted access.

10ft Containers

A popular middle option for trades and workshops. Offers enough room for machinery, materials, and general stock while keeping a small footprint. Easy to deliver across most urban sites.

20ft Containers

This is the most used size. Provides great value per cubic metre and works across construction, retail, events, manufacturing, and home renovation. Best all-round option.

30ft Containers

A long container suitable for commercial projects needing extra floor space. Good for long materials and bulk storage.

40ft Containers

Ideal for high-volume storage, transport, and large commercial operations. Suits depots, industrial yards, and large projects.

45ft Containers

Offers maximum internal length. Best for businesses with very large loads and wide space for delivery.

If you want extra height instead of extra length, see the high cube container option for more headroom.

Which Size Fits Each Use

Every container size fits different tasks. Below is a clear overview to help you choose the best match.

Best for Home and Small Trades

  • 6ft for tools and garden kit
  • 8ft for small equipment and boxed goods

Best for Workshops and General Storage

  • 10ft for mixed tools, machinery, and stock

Best for Most Business Uses

  • 20ft for retail, construction, events, and maintenance teams
    This is the container most businesses choose due to balance of storage and delivery access.

Best for Long Items or Bulk Loads

  • 30ft for long materials and mixed pallets
  • 40ft for high-volume commercial stock

Best for Large Industrial Storage

  • 45ft for extended internal length and long-term commercial operations

If you need local delivery guidance, Unit Group offers support through regional pages such as shipping containers in London and shipping containers in Liverpool.

Delivery Access by Size

Delivery access becomes more demanding as container size increases. Planning this correctly helps avoid delays and failed deliveries.

6ft to 10ft Containers

These sizes are easiest to deliver. They fit into driveways, small yards, and tight urban sites. A small crane vehicle usually handles the placement.

20ft Containers

Still manageable across most commercial settings. Needs a straight approach and space for the vehicle stabilisers. Level ground is essential.

30ft Containers

Require more turning space and a firm site. Often delivered to yards, business parks, depots, and commercial sites.

40ft and 45ft Containers

These need wide access, long approach routes, and strong ground conditions. Delivered using large lorries with crane systems. Suitable for industrial estates, agricultural land, depots, and ports.

For safe lifting and delivery procedures, the Health and Safety Executive provides guidance.

Hire vs Buy Notes

Choosing whether to hire or buy depends on your project length and budget.

Hiring a Container

  • Best for short-term projects
  • Low start-up cost
  • Easy off-hire once the job finishes
  • Ideal for events, renovation, and seasonal use

Buying a Container

  • Best for long-term or ongoing use
  • You can customise the container
  • More cost friendly in the long run
  • Ideal for businesses needing year-round storage

If you want guidance on local hire options, you can view Unit Group’s main service page.