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Vivobarefoot Ra IV Mens Barefoot Shoes

Free delivery: $150+
24-48 hour express delivery
90-day return period
Size Guide
Size Guide - Vivobarefoot

Place a piece of paper larger than your foot against the wall. Ensure that the wall is flat, and if there is any skirting, it is also flat. 

Stand on the paper with your heel against the wall. Ensure that the floor is hard and that the paper does not slide under any gap between the floor and the wall/skirting.

Mark the paper where your longest toe reaches with the pencil. Remember to not tuck the pencil under the toe as you want an accurate maximum measurement.

Measure the distance from the end of the paper to the toe line with a ruler or tape measure.

Repeat with your other foot, they might be different – trust us on this one! – and then use the longest measurement.

Use our conversion tables below to work out your recommended fit.

WOMENS FOOTWEAR SIZE GUIDE

FOOT LENGTH (CM) EU UK US
21.2 - 22.1 35 2.5 4.5
22.2 - 22.8 36 3 5
22.9 - 23.5 37 4 6
23.6 - 24.1 38 5 7
24.2 - 24.8 39 6 8
24.9 - 25.4  40 7 9
25.5 - 26.1 41 8 10
26.2 - 26.8 42 8.5 10.5
26.9 - 27.4 43 9 11

MENS FOOTWEAR SIZE GUIDE

FOOT LENGTH (CM) EU UK US
24.6 - 25.5 40 6 7
25.6 - 26.2 41 7 8
26.3 - 26.9 42 8 9
27.0 - 27.5 43 9 10
27.6 - 28.2 44 10 11
28.3 - 28.9 45 11 12
29.0 - 29.6 46 11.5 12.5
29.7 - 30.3 47 12 13
30.4 - 30.9 48 13 14
31.0 - 31.6 49 14 15
31.7 - 32.3 50 15 16
32.4 - 33.0 51 16 17

TODDLERS FOOTWEAR SIZE GUIDE

FOOT LENGTH (CM) EU UK US
9.4 - 10.2 18 2 3
10.3 - 10.9 19 3 4
11.0 - 11.6 20 4 5
11.7 - 12.3 21 4.5 5.5
12.4 - 13.0 22 5 6
13.1 - 13.6 23 6 7
13.7 - 14.3 24 7 8

PRESCHOOL FOOTWEAR SIZE GUIDE

FOOT LENGTH (CM) EU UK US
14.4 - 14.9 25 8 9
15.0 - 15.6 26 8.5 9.5
15.7 - 16.3 27 9 10
16.4 - 17.0 28 10 11
17.1 - 17.6 29 11 11.5

KIDS FOOTWEAR SIZE GUIDE

FOOT LENGTH (CM) EU UK US
17.7 - 18.3 30 11.5 12
18.4 - 19.0 31 12 13
19.1 - 19.6 32 13 1
19.7 - 20.2 33 1 2
20.3 - 20.9 34 2 3

JUNIOR FOOTWEAR SIZE GUIDE

FOOT LENGTH (CM) EU UK US
21.0 - 21.7 35 3 4
21.8 - 22.4 36 3.5 4.5
22.5 - 23.1 37 4.5 5.5
23.2 - 23.8 38 5 6
23.9 - 24.4 39 6 7

RECOMMENDED

SNUG

 

This shows how a shoe would fit snug. It’s still a correct fit, but with less space around and at the front of the toebox. 

RECOMMENDED

 

This is the shape of the recommended fit of Vivos. Remember, it might not be your preferred fit.

SPACIOUS

 

If you prefer a roomier fit or think you have wider-than-average feet, you might consider going a size up.

Colour: Obsidian
Obsidian
Size: US 7 EU 40
2026-02-20 2026-02-27
Challenge what's normal, follow what's natural. The Ra IV is a classic men's Oxford, reimagined with barefoot soul for strong, free feet. Smart on top, wild below.
Cork & recycled PU insole

The Everyday Cork & recycled PU insole is made from recycled polyurethane, topped with a layer of naturally antibacterial cork.

TOUGH RUBBER COMPOUND

Strong, non-marking rubber compound for sticky grip and high-abrasion when you need it most.

WEIGHT

Based on a single shoe in Men's size: EU 42 | UK 8 | US 9

303g

MATERIALS
UPPER

Wild Hide Leather

lining

Wild Hide Leather

Laces

100% Organic Cotton

insole

Cork Insole

outsole

30% Natural Rubber, 70% Synthetic Rubber

MADE IN VIETNAM
Care
Cleaning

Brush off mud and clean with a damp cloth

Drying

Remove insole and dry at room tempreture. Keep out of direct sunlight and avoid putting on a radiator.

Aftercare

We recommend using Renapur Leather Balsam to nourish the leather, restore the colour and finish and help prevent your footwear from drying out and cracking. It will also clean surface dirt from drying out and cracking. It will also clean surface dirt from your footwear and help to waterproof them. It's ideal to treat new footwear as it helps relax the new leather breaking in easier.

Repair Options

Laces and insoles can be replaced. Outsoles and hardware can be replaced with our Revivo Repairs Programme.

End of life

Once you can’t repair or don't need them anymore, send us your old Vivos and we’ll make they sure they’re given a second life, or if they’re really well-loved, we'll store them until we launch our recycling solution.

Follow nature, not tradition

The Natural, Wild Hide Leather Oxford That Blurs Work And Play

Why go barefoot

Wearing Vivos for 6 months increases foot strength by 60%

Fit

Better Balance and Posture

Foot-shaped fit enables toes to splay supporting balance and a stable base of support.

Feel

Improved Coordination And Agility

Thin sole allows the thousands of nerve endings in each foot enabling the sensory feedback the brain needs to move with skill.

Flex

Improved Strength and Natural Movement

Flexible footwear let the muscles and tendons load and recoil, supporting stronger, more resilient feet over time.

Discover Your Own Style

Built To Look Smart And Move With Secret Wildness

The Ra IV is for rulebreakers and changemakers who think with their feet. Made with Wild Hide leather, organic cotton laces, and a cork insole, with a 4mm Gobi outsole for naturally strong, flexible feet. Work, play, and live with full ground connection.

Urban

Stripped-back soles for barefoot living — so you're never too far from nature, even in the city.

Fit, Feel, Flex

For natural stability, natural sensory feedback and natural strength.