Name: Olukai Women's Ku'i Slipper
Brand: OLUKAI
SKU: 20457-3419
Price: 139.99 USD
Availability: InStock

$139.99

Shipping calculated at checkout.

Color

TAN/BONE

Size —

Size chart

Sandals & slippers: whole sizes — half sizes size up · Moloa styles run big

Find your OluKai size with OluKai’s official women’s and men’s chart by foot length — or stop in for a Brannock fitting at our Kettering, Ohio store.

Shop OluKai →

Sandals & slippers: half sizes

OluKai sandals and slippers come in whole sizes only.

If you wear a half size, OluKai says sizing up to the next whole size usually fits best — for example, if you wear a 10½ in shoes, a size 11 will likely fit you best in OluKai sandals and slippers.

Shoes

Many OluKai shoes and slip-ons come in half sizes. Start with your usual size, and use the chart below to check your foot length.

Between sizes? Size up if you wear thick socks or orthotics, or you're on your feet all day. Choose the smaller size if you like a snug, athletic fit.

Women

US	UK	EU	Foot length (in)	Foot length (cm)
5	3	35	8.50"	21.6
6	4	36	8.88"	22.5
6½	4½	36.5	9.06"	23
7	5	37	9.25"	23.5
7½	5½	37.5	9.38"	23.8
8	6	38	9.50"	24.1
8½	6½	38.5	9.69"	24.6
9	7	39	9.88"	25.1
9½	7½	39.5	10.00"	25.4
10	8	40	10.19"	25.9
11	9	41	10.50"	26.7

Men

US	UK	EU	Foot length (in)	Foot length (cm)
7	6½	40	9.62"	24.4
8	7½	41	9.94"	25.4
8½	8	41.5	10.12"	25.7
9	8½	42	10.25"	26
9½	9	42.5	10.44"	26.7
10	9½	43	10.56"	27
10½	10	43.5	10.75"	27.3
11	10½	44	10.94"	27.9
11½	11	44.5	11.12"	28.3
12	11½	45	11.25"	28.6
13	12½	46	11.56"	29.4
14	13½	47	11.88"	30.2
15	14½	48	12.19"	31
16	15½	49	12.50"	31.8
17	16	50	12.88"	32.7
18	17	51	13.31"	33.8

Women’s 12 isn’t on OluKai’s chart — call us and we’ll help.

Model exceptions

Moloa slip-on shoe: from our fitting experience, the Moloa runs big. Consider a half size smaller than your usual size.

Moloa Hulu slipper: also runs big. It comes in whole sizes only, so if you wear a half size, choose the next whole size down — the opposite of OluKai’s usual slipper advice.

How to measure

Stand on a sheet of paper, with your weight on that foot.
Mark the back of your heel and the tip of your longest toe.
Measure between the marks in inches or centimeters.
Measure both feet and use the longer one.
Measure later in the day, when feet are at their largest, wearing the socks you’ll wear with the shoes.

Need help? We measure every customer with a Brannock device at our Kettering store. Stop in for a fitting, or call us at 937.298.1801 and we’ll help you choose. Ready to shop? Shop all OluKai →

Source: OluKai size chart and fit FAQ (OluKai) · Last checked October 2026

Width : M — Medium

Only 1 left in size 6
Backordered, shipping soon

Free shipping on this item
30-day returns & exchanges, in store or by mail
Ships in 1 business day · 2-day & 3-day options at checkout

Fit & Feel

Arch Support

Neutral gait · Medium cushion · Everyday wear

The Ku‘i slipper offers cozy comfort with its ultra-fluffy shearling lining and thick rubber sole. Sturdy enough for daily outings, this slipper easily transitions from a house slipper to a cozy slip-on for outdoor adventures. The ultra-puffy shearling and updated outsole ensure maximum comfort and durability.

Features

Ultra-Fluffy Shearling Lining: Provides exceptional warmth and coziness.
Thick Rubber Sole: Sturdy enough for daily outings and outdoor wear.
Versatile Design: Functions as a house slipper and a slip-on for casual outings.

Why You'll Love It

Premium Design: Made from supple full-grain leather and lined with plush, 100% genuine shearling, this slipper is the epitome of comfort.
All-Day Comfort: Inspired by the sensation of bare feet walking on wet sand, Olukai's footbeds provide immediate comfort and sustained support.
Enhanced Grip: Enjoy slip-free steps with Olukai's special Wet Grip Rubber sole keeps you steady and surefooted, all day long.

Fit

Fits true to size
Ku'i means "to join, splice, unite" (koo-ee)

Stock number: 20457-3419

Most orders ship within 1 business day

During busy seasons, processing may take up to 2 days

Same‑Day Shipping

Mon–Fri: Orders placed by 12 PM EST
Saturday: Orders placed by 10 AM EST
Orders placed after these times, on Sundays, or on holidays ship the next business day

Free Shipping
Free shipping on U.S. orders of $75 or more (continental U.S.)
Orders under $75 ship for a flat $5

Carriers Used
Orders ship via USPS or UPS
Weekend/late‑Friday orders may ship USPS to meet timing requirements

Alaska, Hawaii, Military & U.S. Territories
Shipped via USPS Standard/Priority Mail
Typical transit times:
AK/HI/Territories: ~3 days (not guaranteed)
Military addresses: 10–15 days

Transit Times
USPS Priority Mail may display “1‑Day,” “2‑Day,” or “3‑Day,” which reflects USPS’s estimate after the package ships
These estimates do not include processing time.

Need It Faster?
UPS 3 Day Air ($20) and UPS 2nd Day Air ($25) are available at checkout

SKU: 20457-3419

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Ku'i

Sandals & slippers: half sizes

Shoes

Women

Men

Model exceptions

How to measure

Features

Why You'll Love It

Fit

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