True-to-Size Millimeter Sizing Comparison

Reef Fanning vs Reef Fanning W

Detailed size conversion chart, cavity measurements in millimeters, and crowd-sourced fit advice for choosing your perfect size.

Shoe Aunisex
Reef Fanning
4.6(3,488 reviews)
Fit TendencyTrue to Size
Width ProfileStandard (Medium)
View Full Fanning Breakdown
Shoe Bunisex
Reef Fanning W
4.5(2,522 reviews)
Fit TendencyTrue to Size
Width ProfileStandard (Medium)
View Full Fanning W Breakdown
Fit Verdict

True to Size Comparison

Both shoes share a very similar length profile. We recommend ordering your standard size in both.

Length Delta+0.04 mm
Width Delta+0.18 mm

Interactive Size Converter

Select what size you wear in the Fanning to see your calculated size in the Fanning W.

Recommended Size in Reef Fanning W
US 8.5100% Match

Internal shoe cavity difference: +0.0 mm (slightly roomier)

Complete Size Conversion Matrix

Direct millimeter-calibrated mapping comparing all available sizes between both shoes.

Fanning (US)Internal CavityFanning W EquivalentMatch AccuracyFit Difference
US 3.5240 mmUS 3.5100%+0.0 mm
US 4243 mmUS 4100%+0.0 mm
US 4.5247 mmUS 4.5100%+0.0 mm
US 5250 mmUS 5100%+0.0 mm
US 5.5253 mmUS 5.5100%+0.0 mm
US 6257 mmUS 6100%+0.0 mm
US 6.5260 mmUS 6.5100%+0.0 mm
US 7267 mmUS 7100%+0.0 mm
US 7.5270 mmUS 7.5100%+0.0 mm
US 8273 mmUS 8100%+0.0 mm
US 8.5277 mmUS 8.5100%+0.0 mm
US 9280 mmUS 9100%+0.0 mm
US 9.5283 mmUS 9.5100%+0.0 mm
US 10287 mmUS 10100%+0.0 mm
US 10.5290 mmUS 10.5100%+0.0 mm
US 11293 mmUS 11100%+0.0 mm
US 11.5297 mmUS 11.5100%+0.0 mm
US 12300 mmUS 12100%+0.0 mm
US 12.5303 mmUS 12.5100%+0.0 mm
US 13307 mmUS 13100%+0.0 mm
US 14313 mmUS 14100%+0.0 mm

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Frequently Asked Questions

How does the Fanning size compare to the Fanning W?

Both shoes share a very similar length profile. We recommend ordering your standard size in both. The Fanning has an internal fit offset of -0.12mm compared to -0.08mm for the Fanning W.

Do these shoes fit wide feet comfortably?

The Fanning has a snug/narrow width profile, while the Fanning W is roomy/wide.