True-to-Size Millimeter Sizing Comparison

Merrell Moab 3 vs The North Face THERMOBALL™ Traction Bootie

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

Shoe Amen
Merrell Moab 3
5.0(1,181 reviews)
Fit TendencyTrue to Size
Width ProfileStandard (Medium)
View Full Moab 3 Breakdown
Shoe Bunisex
The North Face THERMOBALL™ Traction Bootie
4.8(3,035 reviews)
Fit TendencyTrue to Size
Width ProfileStandard (Medium)
View Full THERMOBALL™ Traction Bootie Breakdown
Fit Verdict

True to Size Comparison

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

Length Delta0 mm
Width DeltaIdentical

Interactive Size Converter

Select what size you wear in the Moab 3 to see your calculated size in the THERMOBALL™ Traction Bootie.

Recommended Size in The North Face THERMOBALL™ Traction Bootie
US 10.5100% Match

Internal shoe cavity difference: 0.0 mm (snugger)

Complete Size Conversion Matrix

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

Moab 3 (US)Internal CavityTHERMOBALL™ Traction Bootie EquivalentMatch AccuracyFit Difference
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 Moab 3 size compare to the THERMOBALL™ Traction Bootie?

Both shoes share a very similar length profile. We recommend ordering your standard size in both. The Moab 3 has an internal fit offset of 0mm compared to 0mm for the THERMOBALL™ Traction Bootie.

Do these shoes fit wide feet comfortably?

The Moab 3 has a standard medium width profile, while the THERMOBALL™ Traction Bootie is standard medium.