True-to-Size Millimeter Sizing Comparison

Lucky Brand Basel vs Lucky Brand Eikia Ballet Flat

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

Shoe Awomen
Lucky Brand Basel
4.0(1,452 reviews)
Fit TendencyRuns Small (-4mm)
Width ProfileStandard (Medium)
View Full Basel Breakdown
Shoe Bwomen
Lucky Brand Eikia Ballet Flat
4.3(438 reviews)
Fit TendencyRuns Small (-4mm)
Width ProfileStandard (Medium)
View Full Eikia Ballet Flat 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 Basel to see your calculated size in the Eikia Ballet Flat.

Recommended Size in Lucky Brand Eikia Ballet Flat
US 8100% Match

Internal shoe cavity difference: 0.0 mm (snugger)

Complete Size Conversion Matrix

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

Basel (US)Internal CavityEikia Ballet Flat EquivalentMatch AccuracyFit Difference
US 4.5229 mmUS 4.5100%0.0 mm
US 5233 mmUS 5100%0.0 mm
US 5.5236 mmUS 5.5100%0.0 mm
US 6239 mmUS 6100%0.0 mm
US 6.5243 mmUS 6.5100%0.0 mm
US 7246 mmUS 7100%0.0 mm
US 7.5249 mmUS 7.5100%0.0 mm
US 8253 mmUS 8100%0.0 mm
US 8.5256 mmUS 8.5100%0.0 mm
US 9263 mmUS 9100%0.0 mm
US 9.5266 mmUS 9.5100%0.0 mm
US 10269 mmUS 10100%0.0 mm
US 10.5273 mmUS 10.5100%0.0 mm
US 11276 mmUS 11100%0.0 mm

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Frequently Asked Questions

How does the Basel size compare to the Eikia Ballet Flat?

Both shoes share a very similar length profile. We recommend ordering your standard size in both. The Basel has an internal fit offset of -4mm compared to -4mm for the Eikia Ballet Flat.

Do these shoes fit wide feet comfortably?

The Basel has a standard medium width profile, while the Eikia Ballet Flat is standard medium.