What size should I get in Reef Reef Neptune?

Shoe Fit calculates your millimeter shoe cavity to recommend your exact size in the Reef Reef Neptune by comparing against shoes you already own.

ReefUnisex

Reef Neptune

Fit verdict, size conversion guide, and millimeter measurements.

Find Your Size

Fit Analysis & Sizing Advice

Order 1/2 Size Down

This shoe runs approximately 4mm longer than standard sizing. If you prefer a snug fit or are between sizes, go a half size down.

Runs Small (–8mm)True to SizeRuns Large (+8mm)

Snug / 1 Size UpStandard fitRoomy / 1 Size Down

Width: Standard Width (Medium). Conforms to standard medium width.

Community Fit Consensus

Aggregated feedback from verified shoe owners

4.9

(2,396 ratings)

79% of wearers report this shoe fits True to Size.

Length Distribution

Runs Small2%

True to Size79%

Runs Large19%

Width Distribution

Runs Narrow2%

Standard Width85%

Runs Wide13%

Complete Size Chart

Showing 21 sizes

EU	US (M)	UK	Foot Length	Cavity Length
36	3.5	3	24.0 cm	244 mm
36.5	4	3.5	24.3 cm	247 mm
37	4.5	4	24.7 cm	251 mm
37.5	5	4.5	25.0 cm	254 mm
38	5.5	5	25.3 cm	257 mm
38.5	6	5.5	25.7 cm	261 mm
39	6.5	6	26.0 cm	264 mm
40	7	6.5	26.7 cm	271 mm
40.5	7.5	7	27.0 cm	274 mm
41	8	7.5	27.3 cm	277 mm
41.5	8.5	8	27.7 cm	281 mm
42	9	8.5	28.0 cm	284 mm
42.5	9.5	9	28.3 cm	287 mm
43	10	9.5	28.7 cm	291 mm
43.5	10.5	10	29.0 cm	294 mm
44	11	10.5	29.3 cm	297 mm
44.5	11.5	11	29.7 cm	301 mm
45	12	11.5	30.0 cm	304 mm
45.5	12.5	12	30.3 cm	307 mm
46	13	12.5	30.7 cm	311 mm
47	14	13.5	31.3 cm	317 mm

Frequently Asked Questions

Does the Reef Reef Neptune run big or small?

It tends to run slightly roomy. We recommend ordering a half size down. This shoe runs approximately 4mm longer than standard sizing. If you prefer a snug fit or are between sizes, go a half size down.

How does Shoe Fit determine shoe sizing?

Shoe Fit calculates the real-world interior shoe cavity in millimeters combined with real owner feedback, rather than relying on arbitrary brand charts.

Find Your Exact Size

Already own a shoe that fits well? Shoe Fit cross-references its internal cavity against the Reef Reef Neptune to give you your personalized size.

Instant recommendation

Accounts for width & stretch

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Model Details

BrandReef

ModelReef Neptune

Gender SpecUnisex

Sizes Offered21 sizes

Community Rating4.9 ★ (2396 votes)