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Convert / Shoes

La Sportiva to On shoe size

The short answer

La Sportiva 39.5 is On 8 by the two brands' own charts.

At least one of the two brands publishes no foot length, so the rows line up the US size both charts print. Treat it as the label conversion, not a fit.

Every La Sportiva size read across to On. EU sizes on the left, US women's on the right.
La SportivaLa Sportiva builds it forOn, by chartSame labelOn builds it forOn also prints
36not published5.5not publishedfoot length 22.5 cmUK 3.5 · EU 36.5 · CM / JP 22.5
36.5not published5.5 or 6not publishedfoot length 22.5 cmUK 3.5 · EU 36.5 · CM / JP 22.5
37not published6not publishedfoot length 23 cmUK 4 · EU 37 · CM / JP 23
37.5not published6.5not publishedfoot length 23.5 cmUK 4.5 · EU 37.5 · CM / JP 23.5
38not published7not publishedfoot length 24 cmUK 5 · EU 38 · CM / JP 24
38.5not published7.5not publishedfoot length 24.5 cmUK 5.5 · EU 38.5 · CM / JP 24.5
39not published7.5 or 8not publishedfoot length 24.5 cmUK 5.5 · EU 38.5 · CM / JP 24.5
39.5not published8not publishedfoot length 25 cmUK 6 · EU 39 · CM / JP 25
40not published8.5not publishedfoot length 25.5 cmUK 6.5 · EU 40 · CM / JP 25.5
40.5not published9not publishedfoot length 26 cmUK 7 · EU 40.5 · CM / JP 26
41not published9.5not publishedfoot length 26.5 cmUK 7.5 · EU 41 · CM / JP 26.5
41.5not published9.5 or 10not publishedfoot length 26.5 cmUK 7.5 · EU 41 · CM / JP 26.5
42not published10not publishedfoot length 27 cmUK 8 · EU 42 · CM / JP 27
42.5not published10.5not publishedfoot length 27.5 cmUK 8.5 · EU 42.5 · CM / JP 27.5
43not published11not publishedfoot length 28 cmUK 9 · EU 43 · CM / JP 28
Tinted rows change label or sit between two sizes. Read from the two charts only; no formula and no averaging.

What wearers say

Charts describe a garment. People who own both brands describe a fit, and their answer ranks above this table once five of them stand behind it. Pick your size in the converter to see whether there are enough yet.

Open in the converterAdd an item you own

Sources

On to La Sportiva