Sizing is the number one reason tradespeople hesitate before ordering CleanBoot® overshoes online. The concern is always the same: will these actually fit over my boots? It is a fair question — safety boots are not uniform in their dimensions, and an overshoe that will not fit, or that slips off mid-job, is worse than useless. This guide answers the sizing question definitively and explains the size options and a simple, reliable method for confirming your fit before you leave the front door. Ordering CleanBoot® for your team? →
The Elastic Opening: Engineered to Stretch
The foundation of the CleanBoot® sizing system is the stretchable elastic opening at the top of the cover. Unlike rigid overshoes or covers with fixed dimensions, CleanBoot® uses high-quality elastic banding that stretches significantly beyond its resting circumference before applying the return tension that keeps the cover firmly in place around the boot shaft.
This stretch capability is what allows CleanBoot® to accommodate a wide range of boot profiles. The current CleanBoot® range covers footwear from UK size 3 through 14, with the elastic opening helping accommodate differences in boot width and volume. Because safety footwear can vary considerably in volume and sole thickness, choosing the right size for the type of boot you wear is important. View the full CleanBoot® range →
The Four Sizes Explained
CleanBoot® overshoes are available in four sizes that cover the full spread of trade footwear:
- Small — UK 3–5: suited to safety trainers and lighter work footwear at the smaller end of the adult size range
- Medium — UK 6–7: covers mid-range safety trainers, composite-toe shoes, and lighter safety boots
- Large — UK 8–10: the most commonly ordered size across the UK trade sector, fitting the majority of rigger boots, standard safety boots, and composite-toe footwear
- Extra Large — UK 11–13: designed for larger boots including wide-fit safety boots, heavy rigger boots, and work wellies at the upper end of the size range
There is some overlap between the size ranges, which is useful because work boots are not all the same shape. If your footwear is particularly bulky or wide, going up a size may provide a better fit. If you wear a lower-profile safety trainer, a smaller size may be more appropriate.
View all CleanBoot® sizes and order online →
The Shake Test — Your At-Home Fit Check
Here is the simplest and most reliable way to confirm your CleanBoot® is the right size.
Put the CleanBoot® on over your work boot as normal. Stand up. Lift your foot off the floor so you are standing on one leg. Then give your raised foot a firm shake — as if you were shaking water off the boot.
If the CleanBoot® stays on, it fits. If it falls off, size down.
No measuring, no complicated comparisons — just a quick functional test that tells you immediately whether the elastic opening is engaging correctly with your boot. The current CleanBoot® guidance similarly recommends checking that the cover remains securely in place when you lift your feet. See the CleanBoot® sizing and fitting information →
Sizing Guidance by Boot Type
Different types of work footwear have different profiles. Here is specific guidance for the most common boot types across UK trades:
Heavy Rigger Boots
Rigger boots have more volume than their size suggests. If you wear a rigger boot at the upper end of a CleanBoot® size range — for example a UK 10 in the Large range — sizing up to Extra Large can give a better fit and makes the cover easier to pull on and off quickly. The Shake Test will confirm.
Composite-Toe and Safety Trainers
Safety trainers are typically slimmer in profile than rigger boots. If you are at the lower end of a size range, the standard size for your shoe size will usually be correct. If your standard-size CleanBoot® passes the Shake Test but feels very loose, consider sizing down.
Bump Cap Boots
Bump cap boots are similar in profile to safety trainers. Follow the same guidance: standard size for your shoe size, confirmed with the Shake Test.
Work Wellies
Rubber work boots generally fit within the standard size for boot length. For particularly wide-shaft wellies, sizing up is worth trying.
The 99% Fit Guarantee
The claim that CleanBoot® fits 99% of work boots is not marketing language — it is a reflection of the elastic opening’s genuine stretch capability and the four-size range that collectively covers UK 3 through 13. The 1% outside this range consists of extreme-width specialist boots well outside the standard trade footwear spectrum. If you have a concern about a specialist boot — orthopaedic adaptations, non-standard width fittings, unusual constructions — contact the CleanBoot® team before ordering.
Why Getting the Fit Right Matters
A correctly fitted CleanBoot® performs as designed: the neoprene body prevents print-through damage, the PU sole provides genuine grip on smooth surfaces, and the elastic opening holds the cover in position through the full range of movements a tradesperson makes on a typical job — crouching, climbing, pivoting, and working at height.
A cover that is too large will shift underfoot, reducing the effectiveness of the PU sole grip. A cover that is too small will over-stretch the elastic beyond its designed tension range, shortening its working life. Getting the right size ensures the product performs as engineered.
The Shake Test makes getting it right simple. Order by your standard boot size, test on arrival, and you will almost certainly have exactly what you need. Order your CleanBoot® →
