How Should Safety Boots Fit? A CSA Boot Sizing Guide

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This guide is for Canadian workers buying CSA safety boots who want the size right the first time, especially when ordering online. The short answer: a safety boot should leave your toes about 12.5 mm from the front, grip your heel snugly when laced, and feel right on the day you buy it, because the Canadian Centre for Occupational Health and Safety (CCOHS) says not to expect footwear to stretch with wear. Measure both feet late in the day, wear your work socks, and fit the larger foot.

If width is your problem, the boots below come in more than one width on the maker’s own page. The fit advice comes from CCOHS, the BC Forest Safety Council and the fit guides of Kodiak, Red Wing and KEEN. Your employer’s footwear rules and the CSA rating your job needs come first.

Quick Picks

• If you need a Wide option with a toe cap lighter than steel: KEEN Utility Men’s CSA San Jose 6” Waterproof Boot (Aluminum Toe)
• If you need an extra-wide H width or a size 16: Red Wing Tradesman 6-inch Waterproof Safety Toe Boot (#3532)
• If you need a narrow B width or an insulated 8-inch boot: Red Wing SuperSole 2.0 8-inch Insulated Waterproof Steel Toe Boot (#2412)
• Who should not buy any of these: anyone who needs a women’s-specific boot or a metatarsal guard. All three are men’s boots, and none of these pages lists a met guard.

The Three Boots Compared

How a Safety Boot Should Fit

A safety boot is not a running shoe. The toe cap does not give, and CCOHS says plainly not to expect footwear to stretch with wear. Its foot comfort page adds that you should not buy tight shoes expecting them to loosen. So the fit you feel in the store, or in your living room after an online order, is close to the fit you will live with.

Toe room in front of the cap

CCOHS says boots should have “ample toe room”, with toes about 12.5 mm from the front. The BC Forest Safety Council’s safety footwear crew talk gives the same idea as about 1.25 cm of space. CCOHS measures from the front of the boot. Neither gives a separate number for the gap between your toes and the toe cap, so use the front-of-boot figure as your guide.

CCOHS also says the front of the shoe should leave the toes free to move. KEEN’s hiking-boot fit guide suggests a “tippy-toes test”: rise up on your toes and check that they can splay and don’t hit the front or top of the boot.

Width

Width is where many online orders go wrong. CCOHS gives one simple check: the inner edge of the shoe should be straight from the heel to the end of the big toe. If your big toe is being pushed toward your other toes, the boot is too narrow or the wrong shape for you.

Red Wing says its in-store fitters measure length, width, arch height and pressure points. Online, you have to do that work yourself. Kodiak’s fit guide warns that sizes vary between brands and styles, and KEEN says different brands or styles may fit differently even when labelled the same size. That is why a boot sold in more than one width gives you a better chance of a good fit.

Heel hold

CCOHS says that when laced, boots should fit snugly around the heel and ankle, and that the shoe should grip the heel firmly. Lace boots fully. CCOHS also says the shoe should have a fastening across the instep to keep the foot from slipping when walking.

KEEN suggests checking for heel lift by putting your foot at different angles and walking up stairs. Red Wing’s fit guide says to expect slight heel movement at first in its leather boots, because the leather will shape to your foot. Put those together: a little movement in a new leather boot can be normal, but the heel should still feel held, not loose.

When and how to measure

• Late in the day. CCOHS says to shop in the late afternoon, when feet are at their largest from swelling. Its safety footwear page says to try boots on around midday. Kodiak says to shop during or after the end of your workday.
• Both feet. CCOHS says to measure both feet, since they usually differ in size, and to fit the larger foot. Kodiak and KEEN both say to try on or measure both.
• In your work socks. CCOHS says to allow for the extra socks or arch supports you use at work and try boots on with them. Kodiak says sock thickness changes fit. CCOHS also warns that tight socks can cramp toes as much as a poorly fitting shoe.
• Don’t trust your old size. KEEN says not to assume you know your foot size.

KEEN Utility Men’s CSA San Jose 6” Waterproof Boot (Aluminum Toe)

Who it suits: workers who want a choice of Regular or Wide in a 6-inch waterproof boot with a lighter safety toe.

KEEN Canada’s page says the San Jose (style 1023250) “meets CSA Z195-14 Grade 1 standards for protection”. The toe caps are asymmetrical aluminum, which KEEN says weigh 35% less than steel.

For sizing, the facts that matter:

• Widths: Regular and Wide.
• Sizes: men’s 7 to 15, with half sizes from 7 to 11.5.
• Removable insole: a removable metatomical insole, so you can fit your own if your employer allows it (see the insole note below).
• Shaft height: 7.01 in / 178 mm.

The page also lists a KEEN.DRY waterproof, breathable membrane, a non-metallic woven-textile puncture-resistant plate, and an oil- and slip-resistant rubber outsole rated heat-resistant up to 572°F/300°C. Its tags include Electric Shock Resistant (ESR). Check your site’s electrical rules before relying on it. KEEN lists the weight as 27.51 oz / 780 g.

What buyers say: on keenfootwear.ca it is rated 3 out of 5 from 27 reviews. We did not find buyer review patterns for this CSA style, so check recent reviews on the listing for comments about width and length before you order.

Red Wing Tradesman 6-inch Waterproof Safety Toe Boot (#3532)

Who it suits: workers with wide or large feet who need more than one wide option, or a size 16.

The Tradesman’s page lists “CSA Grade 1, ESR Rated, PR”. The page lists ESR without more detail, so your site’s electrical rules decide whether it meets your needs. The toe is listed as non-metallic. Red Wing calls it the NanoToe.

This is the widest size and width range of the three:

• Widths: D, EE and H.
• Sizes: 6 to 16, with half sizes from 6 to 11.5.
• Last: Red Wing says the last (the foot-shaped form the boot is built on) “provides spacious toe room for added comfort as foot expands”.
• Footbed: removable polyurethane footbed.

Red Wing’s own fit guide says its Work boots typically fit true to size, while its Heritage boots typically run a half size to a full size larger. The Tradesman is a Work boot, so start from your measured size, not the half-size-down advice you may have heard about Red Wing’s Heritage line.

Other specs from the page: full grain waterproof leather with Red Wing’s three-layer waterproofing (a moisture-deterrent lining, cushioning foam and a waterproof bootie), and a VersaTrax outsole that the page says resists melting at a minimum of 475°F. The listed weight is 3 lbs. 13 oz., and the page does not say whether that is one boot or a pair. Red Wing says this boot is not resoleable.

What buyers say: we could not find buyer review patterns for this model, so we don’t report any. Check recent reviews on the listing for comments about width and length before you order.

Red Wing SuperSole 2.0 8-inch Insulated Waterproof Steel Toe Boot (#2412)

Who it suits: workers with narrow feet, or anyone who wants an insulated 8-inch winter boot in an in-between width.

The SuperSole 2.0 #2412 lists the same CSA line as the Tradesman: “CSA Grade 1, ESR Rated, PR”. It has a steel toe and a Swen-Flex puncture-resistant insole.

Its width range runs the other way from most boots aimed at wide feet:

• Widths: B, D, E and EEE.
• Sizes: 6 to 15, with half sizes from 6 to 11.5.
• Height: 8-inch.

For winter, the page lists 400g 3M Thinsulate Ultra insulation, GORE-TEX waterproofing and full-grain waterproof leather. The Aztec SuperSole 2.0 outsole is dual-density urethane with a softer inner core and a harder clear outer shell, and the page says it resists chemicals and oil. Red Wing lists it as resoleable. The page does not list a weight.

If you plan to wear thicker winter socks in an insulated boot, try it on with those exact socks. CCOHS and Kodiak both say to fit boots with the socks you wear at work.

What buyers say: we could not find buyer review patterns for this model, so we don’t report any.

Getting the Size Right When You Order Online

A five-minute fit check at home

Kodiak’s fit guide gives a simple routine for new boots:

1. Fully lace both boots.
2. Walk, bend and flex to check comfort.
3. Pay close attention to the toe and heel, because rubbing or pinching there can lead to blisters.
4. Wear them indoors on a clean surface for a few minutes to confirm the size.

CCOHS adds that you should walk in new footwear to make sure it is comfortable.

Insoles and orthotics

If you use orthotics, bring them to the fitting. CCOHS says to try boots on with the arch supports you use at work. Kodiak also warns that changing footbeds or insoles can affect fit and protection, and may take footwear out of compliance with the CSA Z195 standard. CCOHS says to check with the manufacturer that inserts do not affect the level of protection. Ask before you swap anything.

Breaking them in

Red Wing says to start with short wear periods before moving to full shifts. KEEN says its leather gradually conforms to the shape of your foot. Neither changes the core rule: break-in should soften the leather, not fix a boot that is too short or too narrow. For a day-by-day plan, see our guide on how to break in work boots without blisters.

Socks matter more than you think

Sock thickness changes how a boot fits, and CCOHS warns that wrinkled socks, or socks that are too big or too small, can cause blisters. Pick your work socks before you size your boots. If you are choosing new ones, our merino wool work sock guide covers thicknesses and heights.

What about CSA Z195.1?

CSA Z195.1-16 is CSA Group’s guideline on the selection, care and use of protective footwear. It is a companion to the CSA Z195-14 footwear standard. CSA’s store page does not describe fit or sizing advice, so the fit steps in this guide come from CCOHS, the BC Forest Safety Council and the brands named above. For what the symbols on a CSA label mean, see CSA safety boot symbols explained.

If your feet are very wide

If even an EE or H feels tight, our guide to work boots for wide feet in Canada compares more CSA boots that list wide widths.

Who Should Buy What

• Standard-to-wide feet, wanting a toe cap lighter than steel: KEEN Utility CSA San Jose 6”, in Regular or Wide.
• Very wide feet, or size 16: Red Wing Tradesman #3532, in EE or H.
• Narrow feet: Red Wing SuperSole 2.0 #2412, in B.
• In-between widths and cold outdoor work: Red Wing SuperSole 2.0 #2412, in E or EEE, with 400g insulation.
• Anyone ordering online: measure both feet late in the day in your work socks, fit the larger foot, and check the 12.5 mm toe gap and heel hold before you wear the boots outside.