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10 models to compare

How do dry boxes compare for a rectangular storage space?

NRS Boulder measures 23.75 in by 15.5 in by 10.75 in outside; Nanuk 903 measures 9.1 in by 6.8 in by 3.8 in. Your gear needs separate interior dimensions.

For a small storage bay, 903 takes less room.

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With no preferences selected: 20-inch Camera Hard Case 227 is one option to compare.

No hands-on testingMethod and sources

20-inch Camera Hard Case 227 · first with a product link

  • Longest exterior side: 19 3/4 in.
  • Middle exterior side: 15 3/4 in.
What to note:

Shortest exterior side: 7 1/2 in.

View at Condition 1

If you choose Up to 9 1/2 in for longest exterior side, the first option with a product link becomes 903.

10 models compared; 10 have a product-page link.

The picks

5 options to compare

Compare the details that matter to your setup.

An option to compare

20-inch Camera Hard Case 227

Longest exterior side: 19 3/4 in.

Key details

  • Middle exterior side: 15 3/4 in.

What to note

Shortest exterior side: 7 1/2 in.

Longest exterior side: 19 3/4 inMiddle exterior side: 15 3/4 inShortest exterior side: 7 1/2 in
See all 3 specs
Longest exterior side19 3/4 in
Middle exterior side15 3/4 in
Shortest exterior side7 1/2 in

3 of 3 specs available · source checked September 26, 2026 · Source ↗
Condition 1 · Product page checked September 26, 2026

View at Condition 1
Longest exterior side: Up to 9 1/2 in

903

Longest exterior side: 9.1 in.

Key details

  • Shortest exterior side: 3.8 in.

What to note

Middle exterior side: 6.8 in.

Longest exterior side: 9.1 inMiddle exterior side: 6.8 inShortest exterior side: 3.8 in
See all 3 specs
Longest exterior side9.1 in
Middle exterior side6.8 in
Shortest exterior side3.8 in

3 of 3 specs available · source checked September 26, 2026 · Source ↗
NANUK · Product page checked September 26, 2026

View at NANUK
Longest exterior side: Up to 12 1/4 in

7.5 Quart Drybox/Cooler

Longest exterior side: 12 1/4 in.

Key details

  • Middle exterior side: 10 in.

What to note

Shortest exterior side: 8 in.

Longest exterior side: 12 1/4 inMiddle exterior side: 10 inShortest exterior side: 8 in
See all 3 specs
Longest exterior side12 1/4 in
Middle exterior side10 in
Shortest exterior side8 in

3 of 3 specs available · source checked September 26, 2026 · Source ↗
Engel · Product page checked September 26, 2026

View at Engel
Middle exterior side: Up to 6.8 in

S1072 Survivor Dry Box

Longest exterior side: 9.8 in.

Key details

  • Middle exterior side: 6.8 in.

What to note

Shortest exterior side: 3 in.

Longest exterior side: 9.8 inMiddle exterior side: 6.8 inShortest exterior side: 3 in
See all 3 specs
Longest exterior side9.8 in
Middle exterior side6.8 in
Shortest exterior side3 in

3 of 3 specs available · source checked September 26, 2026 · Source ↗
MTM Case-Gard · Product page checked September 26, 2026

View at MTM Case-Gard
Also compare 5

Boulder Camping Dry Box

Longest exterior side: 23 3/4 in.

Key details

  • Middle exterior side: 15 1/2 in.

What to note

Shortest exterior side: 10 3/4 in.

Longest exterior side: 23 3/4 inMiddle exterior side: 15 1/2 inShortest exterior side: 10 3/4 in
See all 3 specs
Longest exterior side23 3/4 in
Middle exterior side15 1/2 in
Shortest exterior side10 3/4 in

3 of 3 specs available · source checked September 26, 2026 · Source ↗
NRS · Product page checked September 26, 2026

View at NRS

Comparing 20-inch Camera Hard Case 227 · 7.5 Quart Drybox/Cooler

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The facts that differ

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0 identical specs shown. Details that do not apply to these models are omitted.

Published specification comparison
Spec20-inch Camera Hard Case 227No preferences selected.7.5 Quart Drybox/CoolerNo preferences selected.
Longest exterior side19 3/4 in12 1/4 in
Middle exterior side15 3/4 in10 in
Shortest exterior side7 1/2 in8 in

20-inch Camera Hard Case 227

No preferences selected.

Longest exterior side
19 3/4 in
Middle exterior side
15 3/4 in
Shortest exterior side
7 1/2 in

7.5 Quart Drybox/Cooler

No preferences selected.

Longest exterior side
12 1/4 in
Middle exterior side
10 in
Shortest exterior side
8 in

20-inch Camera Hard Case 227

View at Condition 1

7.5 Quart Drybox/Cooler

View at Engel

Compare all 10 models

— = no verified listing yet. The published order is independent of links.

All models and their decision specs
ProductHow it comparesKey specCompareAction
20-inch Camera Hard Case 227
Compared with 7.5 Quart Drybox/Cooler: longest exterior side, 19 3/4 in vs 12 1/4 in.
Longest exterior side: 19 3/4 inView at Condition 1
7.5 Quart Drybox/Cooler
Compared with S1072 Survivor Dry Box: longest exterior side, 12 1/4 in vs 9.8 in.
Longest exterior side: 12 1/4 inView at Engel
S1072 Survivor Dry Box
Compared with SE56 Micro Case: longest exterior side, 9.8 in vs 9 1/2 in.
Longest exterior side: 9.8 inView at MTM Case-Gard
903
Compared with S1072 Survivor Dry Box: longest exterior side, 9.1 in vs 9.8 in.
Longest exterior side: 9.1 inView at NANUK
Boulder Camping Dry Box
Compared with S1072 Survivor Dry Box: longest exterior side, 23 3/4 in vs 9.8 in.
Longest exterior side: 23 3/4 inView at NRS
GoNow Box 30L
Compared with S1072 Survivor Dry Box: longest exterior side, 20 in vs 9.8 in.
Longest exterior side: 20 inView at Plano
Guide Series Waterproof Case 3600
Compared with S1072 Survivor Dry Box: longest exterior side, 10.88 in vs 9.8 in.
Longest exterior side: 10.88 inView at Plano
20-inch Camera Hard Case 227
Compared with 7.5 Quart Drybox/Cooler: longest exterior side, 19 3/4 in vs 12 1/4 in.
Longest exterior side: 19 3/4 in
View at Condition 1
7.5 Quart Drybox/Cooler
Compared with S1072 Survivor Dry Box: longest exterior side, 12 1/4 in vs 9.8 in.
Longest exterior side: 12 1/4 in
View at Engel
S1072 Survivor Dry Box
Compared with SE56 Micro Case: longest exterior side, 9.8 in vs 9 1/2 in.
Longest exterior side: 9.8 in
View at MTM Case-Gard
903
Compared with S1072 Survivor Dry Box: longest exterior side, 9.1 in vs 9.8 in.
Longest exterior side: 9.1 in
View at NANUK
Boulder Camping Dry Box
Compared with S1072 Survivor Dry Box: longest exterior side, 23 3/4 in vs 9.8 in.
Longest exterior side: 23 3/4 in
View at NRS
GoNow Box 30L
Compared with S1072 Survivor Dry Box: longest exterior side, 20 in vs 9.8 in.
Longest exterior side: 20 in
View at Plano
Guide Series Waterproof Case 3600
Compared with S1072 Survivor Dry Box: longest exterior side, 10.88 in vs 9.8 in.
Longest exterior side: 10.88 in
View at Plano
10 catalog models

How the comparison works

Your choices are compared with each model’s product details. A missing or conflicting value stays unknown and cannot satisfy a choice you select. The starting order helps you browse; it does not rate real-world performance.

Source dates appear with each link below. A source date does not confirm today's price or stock.

Finder methodologyReport a correction
Sources for all 10 models

Sort the exterior sides before trying an orientation

NRS’s Boulder Camping Dry Box measures 23.75 in by 15.5 in by 10.75 in on the outside. Those are its longest, middle and shortest sides, not fixed labels for the orientation you must use. Compare them with the rectangular space in your vehicle or boat.

Across the 10 cases, the longest exterior side spans 9.1–23.75 in. A longest-side match is insufficient if the middle or shortest side blocks the opening you need to pass through.

Exterior clearance leaves the inside and water limits unresolved

Our case comparison uses maker exterior dimensions without packing equipment into the boxes. NRS’s exterior measurements cannot answer whether padding, dividers and your gear fit inside.

Read interior measurements and the exact case’s use limitations before ordering. In particular, check any restriction on submersion; the words dry box are not enough to decide how the case can be used around water.

Before you buy

Will my gear fit inside a matching box?

Outside dimensions tell you whether the box fits your storage bay. Your gear needs the internal dimensions separately, with room for any padding or dividers. A smaller exterior package does not establish usable interior space.

Are all these boxes waterproof?

Water-resistance ratings and use limits differ. NRS Boulder is not intended for submersion or valuable electronics; MTM describes S1072 as water-resistant, not waterproof. NRS Boulder measures 23.75 in by 15.5 in by 10.75 in outside; Nanuk 903 measures 9.1 in by 6.8 in by 3.8 in. Your gear needs separate interior dimensions. For a small storage bay, 903 takes less room. NRS Boulder and MTM S1072 are water-resistant options with different use limits; neither is a submersion solution for your electronics.

Why are the sides sorted by size?

The sides are ordered longest to shortest to compare rectangular spaces with rotation allowed. That size check leaves out lid movement and latch access. Your storage arrangement needs clearance for those parts too.