Size Guide

How to measure

  1. Stand on a sheet of paper with your heel against a wall, wearing the socks you will wear with the shoe.
  2. Mark the paper at the tip of your longest toe. That is not always the big toe.
  3. Measure from the wall to the mark. Do both feet and use the longer one.
  4. Measure at the end of the day, when feet are at their largest.

Men’s

USInchesCM
79.62″24.4 cm
7.59.79″24.9 cm
89.96″25.3 cm
8.510.12″25.7 cm
910.29″26.1 cm
9.510.46″26.6 cm
1010.62″27.0 cm
10.510.79″27.4 cm
1110.96″27.8 cm
11.511.12″28.3 cm
1211.29″28.7 cm
1311.62″29.5 cm
1411.96″30.4 cm
1512.29″31.2 cm

Women’s

USInchesCM
58.75″22.2 cm
5.58.92″22.6 cm
69.08″23.1 cm
6.59.25″23.5 cm
79.42″23.9 cm
7.59.58″24.3 cm
89.75″24.8 cm
8.59.92″25.2 cm
910.08″25.6 cm
9.510.25″26.0 cm
1010.42″26.5 cm
10.510.58″26.9 cm
1110.75″27.3 cm
1211.08″28.2 cm

Widths

Most of what we carry comes in more than one width. If the length is right but the shoe feels tight across the ball of your foot, go wider rather than longer. Sizing up for width leaves the arch support in the wrong place.

 Men’sWomen’s
MediumDB
Wide2ED
X-Wide4E2E

These are standard US measurements. Fit still varies by brand and by style, and if you wear an orthotic you may need a half size more room. Between sizes, or feet that never seem to fit anything? Call (704) 846-0301. Fitting is what we do.

Orthofeet Onyx Hands-Free Work Shoes (Men's)

$149.00

Black Friday: $149.00 $134.10, 10% off applied automatically

Best for: long shifts on your feet when you need a safety-rated work shoe.

Colour: Black
Size (US)

Fits true to size. Between sizes, or swelling by afternoon? Go up a half.

Width

Ships free from Orthofeet. Arrives in about 3 to 6 business days.

30-day returns on unworn pairs in the original packaging. Details

Questions? Call Paul, (704) 846-0301

Paul's take on the Onyx

Orthofeet Onyx, a men's safety-toe work shoe in a synthetic upper with Orthofeet's hands-free heel. Step on the back, it folds, then springs back and holds. No laces at the start of a shift and nothing to catch.

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Composite toe cap rated to ASTM F2413-24, crush-resistant upper, slip-resistant tread. Ortho-Cushion sole with a mild rocker, removable orthotic insole, extra-depth last, seam-free interior. Takes a custom orthotic. Onyx is not listed as waterproof; for wet floors, Graphite.

Medium, Wide or X-Wide? Medium (D) if your regular shoes fit across the ball of the foot. Wide (2E) if you size up for room or have a bunion. X-Wide (4E) for a bulky orthotic, swelling on shift, or extra-depth. The toe cap is rigid, so err wide. (704) 846-0301 to talk it over.

Stocked in Black only, sizes 7 to 14 in half sizes to 12. Screened and stocked by Paul Henderson, C.Ped, at our Matthews, NC store. Graphite is the boot version, waterproof, with ankle coverage and the same toe. Deciding between the two? I wrote up Onyx vs Graphite.

Quick facts

Entry
Hands-free heel. Step in, no bending.
Widths
Medium (D), Wide (2E), X-Wide (4E)
Insole
Removable, fits a custom orthotic
Upper
Crush-resistant leather with composite toe

Which width is right for me?

Other Orthofeet Paul would put you in

Same hands-free heel and the same width run. Pick by where you'll wear them.

FAQ

Questions people ask

Which width should I order?

Medium (D for men, B for women) if your usual shoes feel fine across the ball of your foot. Wide (2E for men, D for women) if they pinch there or you have a bunion. X-Wide (4E for men, 2E for women) for swelling, an orthotic, or when wide shoes still pinch. Still unsure? Call Paul at (704) 846-0301 and he'll size you by phone.

Will my custom orthotic fit?

Yes. The insole lifts out and the shoe has extra depth, so your orthotic goes in its place. Take the Orthofeet insole out first rather than stacking the two.

How does the hands-free heel work?

Tie the laces once to the fit you like. After that, step down onto the back of the shoe: the heel folds down, then springs back up around your heel. To take them off, press the back down with your other foot.

Should I order my usual size?

Most people wear their usual size. If you're between sizes, or your feet swell by afternoon, go up a half size. If your usual shoes feel tight across the ball of the foot, choose Wide or X-Wide rather than a longer size.

4.8 90+ Google reviews

What people say about being fitted here

These are reviews of our Matthews, NC store, not of this shoe. We'd rather show you real reviews of the fitting than invented reviews of the product.

Read all of them on Google →
  • The staff is friendly, knowledgeable and extremely helpful. The staff have helped me find shoes to alleviate my plantar fascitias pain.

    Ellie HydenGoogle review
  • I am learning to walk again & heal after a procedure to my spine. Thanks to Jim I am able to stand up straight without pain!!!

    Hope ClaryGoogle review
  • Excellent service! Pam was very helpful and informative as she guided me through the process.

    Mike GriffinGoogle review

Technical Details

What you get
  • One pair of Orthofeet Onyx Hands-Free Work Shoes (Men's)
  • Lifetime fit support from our pedorthist team
  • 30-day returns on unworn pairs
  • Free phone consultation with Paul Henderson, C.Ped
Key benefits
  • Patented hands-free heel. Safety-rated, and no bending to put on
  • Crush-resistant upper with composite toe guard
  • Slip-resistant tread for the jobsite
  • Seam-free interior with extra depth and roomy toe box
  • Ortho-Cushion™ System for all-shift comfort
Try on at our Matthews, NC store

Visit us for a complimentary foot evaluation and fitting with our board-certified pedorthist.

  • 924 Park Center Drive Ste 101, Matthews, NC 28105
  • (704) 846-0301
  • Mon–Fri: 10am–6pm · Sat: 10am–4pm

Get Directions

Details

Orthofeet Onyx, a men's safety-toe work shoe in a synthetic upper with Orthofeet's hands-free heel. Step on the back, it folds, then springs back and holds. No laces at the start of a shift and nothing to catch.

Composite toe cap rated to ASTM F2413-24, crush-resistant upper, slip-resistant tread. Ortho-Cushion sole with a mild rocker, removable orthotic insole, extra-depth last, seam-free interior. Takes a custom orthotic. Onyx is not listed as waterproof; for wet floors, Graphite.

Medium, Wide or X-Wide? Medium (D) if your regular shoes fit across the ball of the foot. Wide (2E) if you size up for room or have a bunion. X-Wide (4E) for a bulky orthotic, swelling on shift, or extra-depth. The toe cap is rigid, so err wide. (704) 846-0301 to talk it over.

Stocked in Black only, sizes 7 to 14 in half sizes to 12. Screened and stocked by Paul Henderson, C.Ped, at our Matthews, NC store. Graphite is the boot version, waterproof, with ankle coverage and the same toe. Deciding between the two? I wrote up Onyx vs Graphite.

Fit & Sizing

Runs true to size. Most customers order their usual size.

  • Supportive heel structure for stable alignment
  • Comfort-focused cushioning for hard surfaces
  • Accommodates custom orthotics (where applicable)
Orthotic Integration
  • Removable footbed with depth for orthotic inserts
  • Structured heel cup and reinforced upper
  • Compatible with standard clinical inserts
Specs
  • Style: Safety work shoe
  • Upper: Crush-resistant leather with composite toe
  • Closure: Hands-free slip-on (tie laces once for fit)
  • Widths: Medium, Wide, Extra Wide
  • Best for: Workers needing safety-rated shoes with all-day support
  • Removable insole: Yes, orthotic compatible
Shipping & Returns

Free shipping on orders over $75. Standard shipping typically takes 3-5 business days.

Unworn pairs in the original packaging can be returned within 30 days. Call us first and we'll send a return label. Read the refund policy.

Need Help?

Not sure this shoe is right for your condition? Call (704) 846-0301 and our pedorthist team will help you choose. No visit required.

In the Charlotte area? Visit our Matthews, NC store for a free foot evaluation.