SIZING AND FIT

Our barefoot shoes and sandals are designed with the natural foot shape in mind, emphasizing comfort and freedom. We understand that no two feet are alike, which is why we offer multiple styles to accommodates a wide range of foot shapes and sizes. All our collections feature a wide toe box that allows your toes to splay naturally, just as they would when barefoot, promoting healthy foot function.

If you are new to our brand or to barefoot shoes in general, use the size charts below and follow the tips on how to measure your foot and choose the perfect fit. We strongly recommend printing the templates (where provided).

We’re confident that after you try on our grounding shoes and sandals and experience the benefits of grounding you’ll fall in love! Try them on around the house for 45 days! .Still, if you aren’t entirely happy with your order, you can return your shoes or sandals for a full, hassle free refund. (Visit our Returns and Exchanges page for more info).

Still not sure? Reach out to us at support@groundz.com and we’ll help out!

SIZE GUIDE

B I O S SNEAKERS

Our B I O S sneakers are generally a medium fit and true to size. If you are not used to wearing barefoot shoes with minimal cushioning, we recommend taking some time to acclimate. Start with wearing them for an hour a day and progressively increase time as your feet adjust.

MENS incm

Groundz	US	EU	Insole	Toe Box	Template
-	7	40	10	3.9
-	8	41	10.3	4
-	9	42	10.6	4
-	10	43	11	4.1
-	11	44	11.2	4.1
-	12	45	11.5	4.3
-	12.5	46	12	4.3
-	13	47	12	4.3
-	14	48	12.2	4.4
-	15	49	13	5

Groundz	US	EU	Insole	Toe Box	Template
-	7	40	25.3	9.8
-	8	41	26.2	10
-	9	42	26.9	10
-	10	43	27.8	10.4
-	11	44	28.5	10.4
-	12	45	29.1	10.9
-	12.5	46	30	10.9
-	13	47	30.5	10.9
-	14	48	31.2	11.3
-	15	49	32.4	11.7

WOMENS incm

Groundz	US	EU	Insole	Toe Box	Template
-	5.5	35	9	3.4
-	6	36	9	3.5
-	7	37	9.3	3.6
-	7.5	38	9.5	3.7
-	8	39	9.7	3.7
-	9	40	10	4
-	10	41	10.4	4
-	11	42	10.7	4.1
-	11.5	43	11	4.1
-	-	-	-	-	-

Groundz	US	EU	Insole	Toe Box	Template
-	5.5	35	22.5	8.6
-	6	36	23	8.8
-	7	37	23.7	9.2
-	7.5	38	24.2	9.4
-	8	39	24.7	9.5
-	9	40	26	10
-	10	41	26.5	10
-	11	42	27.1	10.3
-	11.5	43	27.9	10.5
-	-	-	-	-	-

SLIP ONS

The initial fit of our Clay shoes should be snug but not uncomfortable, as they will naturally stretch up to 1/4". With no internal reinforcements, the natural leather will conform to the shape of your feet within days to a few weeks, depending on wear. For the best fit, we recommend ordering a half size up, especially if you plan to wear socks.

MENS CLAYS incm

Groundz	US	EU	Insole	Toe Box	Template
41	8-8.5	40-41	10.5	4.3
42	9-9.5	41-42	10.7	4.4
43	10-10.5	42-43	11	4.5
44	11	43-44	11.3	4.6
45	11.5-12	44-45	11.6	4.6
46	12-12.5	45-46	11.9	4.7
47	13-13.5	46-47	12	4.7
-	-	-	-	-	-

Groundz	US	EU	Insole	Toe Box	Template
41	8-8.5	40-41	26.6	10.9
42	9-9.5	41-42	27.3	11.1
43	10-10.5	42-43	28	11.4
44	11	43-44	28.7	11.6
45	11.5-12	44-45	29.5	11.7
46	12-12.5	45-46	30.1	12
47	13-13.5	46-47	30.7	12
-	-	-	-	-	-

WOMENS CLAYS incm

Groundz	US	EU	Insole	Toe Box	Template
35	4.5	34-35	8.7	3.7
36	5	35-36	9	3.8
37	6	36-37	9.3	4
38	6.5-7	37-38	9.5	4
39	7.5-8	38-39	9.8	4.1
40	8.5-9	39-40	10	4.2
41	9.5-10	40-41	10.4	4.2
42	10.5-11	41-42	10.6	4.3

Groundz	US	EU	Insole	Toe Box	Template
35	4.5	34-35	22.2	9.4
36	5	35-36	22.8	9.7
37	6	36-37	23.5	10
38	6.5-7	37-38	24.2	10.1
39	7.5-8	38-39	24.8	10.4
40	8.5-9	39-40	25.5	10.6
41	9.5-10	40-41	26.4	10.7
42	10.5-11	41-42	26.9	11

WOMENS SANDALS

We've found most customers report that our sandals run slightly small. If you have a wider foot or are between sizes, we'd suggest sizing up to the next half size.

WOMENS COFFEEincm

Groundz	US	EU	Insole	Toe Box	Template
-	6	35.5	9.6	3.8
-	6.5	36	9.8	3.8
-	7	37	9.8	3.8
-	7.5	37.5	10	4
-	8	38	10.2	4
-	8.5	39	10.5	4.1
-	9	39	10.6	4.1
-	10	40	10.8	4.2
-	11	41	11.2	4.3

Groundz	US	EU	Insole	Toe Box	Template
-	6	35.5	24.3	9.7
-	6.5	36	24.9	9.7
-	7	37	25	9.7
-	7.5	37.5	25.5	10
-	8	38	25.9	10
-	8.5	39	26.6	10.4
-	9	39	26.8	10.4
-	10	40	27.5	10.6
-	11	41	28.4	11

WOMENS TRIPLEincm

Groundz	US	EU	Insole	Toe Box	Template
-	6	35.5	9.3	3.7
-	6.5	36	9.4	3.7
-	7	37	9.6	3.7
-	7.5	37.5	9.8	3.7
-	8	38	10	3.8
-	8.5	39	10.2	3.8
-	9	39	10.2	3.8
-	10	40	10.4	3.9
-	11	41	10.5	3.9

Groundz	US	EU	Insole	Toe Box	Template
-	6	35.5	23.5	9.3
-	6.5	36	23.9	9.3
-	7	37	24.4	9.5
-	7.5	37.5	25	9.5
-	8	38	25.3	9.6
-	8.5	39	25.8	9.6
-	9	39	26	9.6
-	10	40	26.4	9.8
-	11	41	26.7	9.8

HOW TO MEASURE

1.
YOUR FOOT LENGTH

Place a piece of paper on the floor with the shorter edge of the paper against a wall. Place your foot on the paper with the heel against the wall. Stand normally so that your body weight is distributed between both feet.
With a pen or pencil, mark the tip of the longest toe. To know your foot length, take a ruler and measure the distance from the mark to the bottom of the page (heel). Optional- measure the width of your foot. Measure both feet as they are not always the same size and use the larger measurement.

Now, go to the sizing chart. Refer to Insole column and choose a measurement that's 0.5cm-1cm (0.2”-0.4") longer than your foot length. For example: Refer to Women's Clays size chart - If you measured 24cm (10.4”), your optimal shoe size would be a Groundz 39 (US7.5-8)

2.
WITH SHOE TEMPLATE

Choose the most appropriate size and print out the corresponding template (PDF) and place the paper against the wall. Ensure the wall and floor is flat.
Place your foot on the template making sure your heel is against the wall. Make sure to stand up straight (don’t sit when measuring).
Look down at the paper and make sure your toes do not pass the line. For clays, do not pass the dotted line.

COMFORT & FIT

B I O S

We recommend wearing B I O S sneakers for at least 30 days in order to experience it’s full benefits! If you experience discomfort with the tongue of the shoe digging into your foot initially, please note that it will soften with regular use. We recommend wearing cotton socks for a few days to ease the break-in period while still enjoying the full benefits of grounding.

CLAYS

You will notice that the insole has stitching along the edges. This Beeswax-coated twine is an integral part of the construction of the shoe and is what allows us not use cements and glues to attach the different parts of the shoe. It is completely normal to feel the twine and it will soften with use. The more you wear them the quicker they will soften. If they are extremely bothersome try wearing them with socks which will speed up the break in period. When wearing them with socks, the stitching is hardly noticeable. Wearing natural cotton socks will still provide grounding!

Have more questions?

EMAIL US
We'll reply within 24 hours or next business day.
support@groundz.com
CALL OR CHAT
On the bottom right side of your screen you'll find a chat button. We usually reply very quickly
(747) 202-0620
HELP CENTER
Go here for more comprehensive support and answers to common questions.
MORE INFO

Better Healthier Fashion

The groundz code
Better health is not just about what you put inside your body, but also what you wear on the outside. Groundz unites style, functionality, and versatility, fusing modern shoe design and the benefits of grounding.
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Natural Materials
We prioritize natural materials over synthetic alternatives wherever possible, using renewable, recyclable, and bio-based materials like wool, cork, leather, and castor bean oil.
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Sustainability
We focus on minimizing environmental impact by using eco-friendly materials and resource-efficient production methods. Our goal is to create footwear that’s long-lasting and serves its function while preserving our planet.
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