True-to-Size Millimeter Sizing Comparison

Sperry AO 2 Eye Leather MM vs Vans Classic Slip-On

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

Shoe Aunisex
Sperry AO 2 Eye Leather MM
4.0(5,519 reviews)
Fit TendencyTrue to Size
Width ProfileStandard (Medium)
View Full AO 2 Eye Leather MM Breakdown
Shoe Bmen
Vans Classic Slip-On
5.0(7,523 reviews)
Fit TendencyTrue to Size
Width ProfileStandard (Medium)
View Full Classic Slip-On 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 AO 2 Eye Leather MM to see your calculated size in the Classic Slip-On.

Recommended Size in Vans Classic Slip-On
US 8.5100% Match

Internal shoe cavity difference: 0.0 mm (snugger)

Complete Size Conversion Matrix

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

AO 2 Eye Leather MM (US)Internal CavityClassic Slip-On EquivalentMatch AccuracyFit Difference
US 3.5240 mmUS 70%+27.0 mm
US 4243 mmUS 70%+24.0 mm
US 4.5247 mmUS 70%+20.0 mm
US 5250 mmUS 70%+17.0 mm
US 5.5253 mmUS 70%+14.0 mm
US 6257 mmUS 70%+10.0 mm
US 6.5260 mmUS 717%+7.0 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 AO 2 Eye Leather MM size compare to the Classic Slip-On?

Both shoes share a very similar length profile. We recommend ordering your standard size in both. The AO 2 Eye Leather MM has an internal fit offset of 0mm compared to 0mm for the Classic Slip-On.

Do these shoes fit wide feet comfortably?

The AO 2 Eye Leather MM has a standard medium width profile, while the Classic Slip-On is standard medium.