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 Delta+0.32 mm
Width Delta+0.03 mm

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 10.596% Match

Internal shoe cavity difference: +0.3 mm (slightly roomier)

Alternate option if between sizes: US 10 (68% match)

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 796%+0.3 mm
US 7.5270 mmUS 7.596%+0.3 mm
US 8273 mmUS 896%+0.3 mm
US 8.5277 mmUS 8.596%+0.3 mm
US 9280 mmUS 996%+0.3 mm
US 9.5283 mmUS 9.596%+0.3 mm
US 10287 mmUS 1096%+0.3 mm
US 10.5290 mmUS 10.596%+0.3 mm
US 11293 mmUS 1196%+0.3 mm
US 11.5297 mmUS 11.596%+0.3 mm
US 12300 mmUS 1296%+0.3 mm
US 12.5303 mmUS 12.596%+0.3 mm
US 13307 mmUS 1396%+0.3 mm
US 14313 mmUS 1496%+0.3 mm

Related Comparisons

Direct RivalryWicked Good Moccasins vs Moab 3View Sizing ComparisonDirect RivalryAriat Rambler vs Moab 3View Sizing ComparisonDirect RivalryWicked Good Camp Moccasins vs Moab 3View Sizing ComparisonDirect RivalryTHERMOBALL Traction Bootie vs Classic Short IIView Sizing ComparisonDirect RivalryWicked Good Moccasins vs THERMOBALL Traction BootieView Sizing ComparisonDirect RivalryTHERMOBALL Traction Bootie vs Classic Mini IIView Sizing Comparison

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 -0.16mm compared to 0.16mm for the THERMOBALL Traction Bootie.

Do these shoes fit wide feet comfortably?

The Moab 3 has a roomy/wide width profile, while the THERMOBALL Traction Bootie is roomy/wide.