Use this chart to find your size conversion.

JP Size US UK EU CM LENGTH
10 6M 1 17 9.5
10.5 12M 2 18 10.5
11.5 18M 3 19 11.4
12.5 24M 4 20 12.1
11.5 4 3 19 11.4
12.5 5 4 20/21 12.1
13.5 6 5 22 13
14.5 7 6 23 14
15 8 7 24 14.6
16 9 8 25/26 15.6
17 10 9 27/28 16.5
18 11 10 29 17.1
18.5 12 11 30 18.1
19.5 13 12 31 19.1
20 BIG KID 1 13 32/33 19.7
21 BIG KID 2 1 34 20.6
22 BIG KID 3 2 35 21.6
22.5 BIG KID 4 3 36 22.2
23.5 BIG KID 5 4 37 23.2
25.5 BIG KID 7 6 39 24.8
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Big Kids' LUMI Waterproof Winter Boot

¥ 7,560

Please choose a size! Please choose an inseam!

The new KEEN Kids waterproof Lumi boot takes on the coldest of days with insulation rated to -40°F/-40°C. This ultralight, extra warm snow boot with cold-weather traction is well-suited to snowy winters.

  • Secure-fit lace-capture system
  • Padded tongue and collar for comfort
  • Removable felt liner with KEEN.WARM insulation rated to -40°F/-40°C
  • KEEN.FREEZE winter rubber compound

We recommend you clean these products using mild soap and cold water. To remove excess dirt or spot clean, use a stiff brush or soft cloth. Let shoes air dry away from heat.

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Chat with a KEEN Expert for style advice and fit recommendations.

Ultimate warmth from school day to snow day.

  • The new KEEN Kids waterproof Lumi boot takes on the coldest of days with insulation rated to -40°F/-40°C. This ultralight, extra warm snow boot with cold-weather traction is well-suited to snowy winters.
  • KEEN.Warm
    Who knew charcoal bamboo could create something that keeps your feet warm? But it makes KEEN.Warm—a lightweight insulation that provides warmth where you need it most.
  • Secure-fit lace-capture system
  • Padded tongue and collar for comfort
  • Removable felt liner with KEEN.WARM insulation rated to -40°F/-40°C
  • KEEN.FREEZE winter rubber compound
Material
  • Waterproof lightweight injected EVA shell and textile upper
  • Non-marking rubber outsole leaves no trace
Care

We recommend you clean these products using mild soap and cold water. To remove excess dirt or spot clean, use a stiff brush or soft cloth. Let shoes air dry away from heat.

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