Green Dog · Made in Britain
Most pieces are sold in size bands, and everything is made to order, so if you need a size between two bands just ask. Spend a few minutes here and your collar or lead fits properly from the first walk.
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Step 1
Measure the dog, not a collar you already own. BioThane®, paracord, PPM rope and bridle leather all sit differently on the neck, and every one of them changes shape with wear. Two minutes with a tape measure saves a return.
Recommended
The method makers and groomers use, and the one I'd choose.
No helper needed
Useful if you are measuring a wriggly dog single-handed.
This gets you to the same number as the two-finger method. Use one or the other, not both.
Where to measure
Wrap the tape around the middle of the neck, halfway between the base of the skull and the top of the shoulders. Check you can slide two fingers between tape and neck before you write the number down.
What to avoid
Materials stretch and compress at different rates. Whatever that collar measures today, it isn't what your dog measures.
Step 1b, sighthounds
Sighthounds only
A sighthound collar sits higher on the neck than an ordinary collar, so the measuring point in the two methods above is not the right one for these breeds.
On a whippet, greyhound, lurcher or Italian greyhound the neck is wider than the head, so a collar sized to the middle of the neck can pull off over the ears. That is how a sighthound backs out of a collar. If you are not sure, send me the measurement before you order and I will check it.
Step 2
Every adjustable collar is checked on a 3D-printed sizing pyramid, calibrated to each inch size, before it is packed. It isn't an estimate. It is a physical check.
What the pyramid does. When a finished collar slides onto it, every adjustment hole can be confirmed to sit exactly where it should for the size you ordered.
How a size range works. The tightest hole fits the smallest neck in the range. Take the 14 to 17 inch size: the tightest hole is snug on a 14 inch neck, and each hole after it adds room up to 17 inches, which is space for a winter coat or a more relaxed fit.
Choosing between ranges. If your dog measures 15 inches on the two-finger rule, the 14 to 17 inch size starts snug and leaves comfortable room beyond. You aren't guessing, and neither am I.
Made to your number, if you ask. Everything here is made to order, so if you would rather I built the collar to one exact measurement than to a band, say so in the order notes and the pyramid is how I check I have hit it.
Step 3
Find your measurement in the chart that matches the range you're buying from. Every figure is a neck measurement unless stated otherwise.
| Collar size | Neck measurement |
|---|---|
| 9 to 12 in | 23 to 30 cm |
| 11 to 14 in | 28 to 36 cm |
| 14 to 17 in | 36 to 43 cm |
| 17 to 20 in | 43 to 51 cm |
| 20 to 23 in | 51 to 58 cm |
| 23 to 26 in | 58 to 66 cm |
Not every range carries every size. Centimetre figures are rounded to the nearest whole centimetre.
| Range | Sizes offered | Equivalent |
|---|---|---|
| The Dingley & Brampton Mini | 8 to 10, 9 to 11, 10 to 12, 11 to 13 in | 20 to 25, 23 to 28, 25 to 30, 28 to 33 cm |
| Classic Leather | Small 10 to 13, Medium 11 to 15, Large 14 to 18 in | 25 to 33, 28 to 38, 36 to 46 cm |
| Cotswold Heritage Leather Sighthound | 11 to 13.5 in Italian Greyhound & Dachshund · 12 to 14 in Whippet · 13 to 18 in Lurcher | 28 to 34 · 30 to 36 · 33 to 46 cm |
| Greenwich Yarn (non-adjustable) | 11.8 to 23.6 in internal | 30 to 60 cm internal, in 1 cm steps |
| 10mm Slip Collar | Fits up to 16, 18, 20, 22, 24, 28, 32 or 36 in | up to 41, 46, 51, 56, 61, 71, 81 or 91 cm |
Greenwich Yarn collars are non-adjustable and sized by internal circumference, so measure the widest part of the head. If your dog's head measures under 30 cm, the Greenwich Yarn Mini covers 18 to 33 cm. The 10mm slip collar is sized by the maximum neck it will close down over.
| Lead | Lengths offered | Equivalent |
|---|---|---|
| BioThane lead | 120 to 200 cm | 3ft 11in to 6ft 7in |
| The Strand & Notting Hill Nose slip leads | 120 to 230 cm | 3ft 11in to 7ft 7in |
| Greenwich Yarn lead | 120 to 170 cm | 3ft 11in to 5ft 7in |
| Hands-free and waist leads | 213 to 488 cm | 7 to 16 feet |
On slip and figure-of-8 leads I add 30 cm for the loop after you order, so give me the slider-to-handle length only.
Step 4
Width changes how a collar looks and how it carries load. Wider spreads pressure over more of the neck, which matters most on fine-necked breeds. Every wool collar is a woven panel on a narrower strap, and the two figures below are the panel and the strap.
19mm approx. 0.75 in
Single width throughout
The standard across the paracord and BioThane® ranges, and the strap width on every classic wool collar. Smart on almost any breed and practical for daily walking.
Small · Medium · Large breeds34mm approx. 1.3 in
34mm wool weave on a 19mm strap
The woven panel on The Brampton and The Dingley in Classic. The 34mm weave spreads the load across the neck; the 19mm strap behind it takes the buckle and the D-ring. Leather or BioThane®, your choice.
Terriers to retrievers43mm approx. 1.7 in
43mm wool weave on a 19mm strap
The widest panel I make. A long, fine neck carries less muscle, so the load wants spreading over more of it. Same 19mm strap behind, in leather or BioThane®.
Whippets · Lurchers · Greyhounds38mm approx. 1.5 in
38mm BioThane® body on a 19mm strap
The sighthound cut in waterproof BioThane®. A 38mm body tapering to a 19mm strap, the same pressure-spreading shape as the wool sighthound, in a material you can rinse under a tap.
Sighthounds who swim20mm approx. 0.8 in
20mm wool weave on a 16mm strap
Everything scaled down for a small neck. The 16mm strap is cut to match the 16mm BioThane® alternative exactly, so the two look identical on the dog, and the hardware is scaled with it.
Dachshunds · Small breedsBespoke any width
Made to your specification
If none of the above is right for your dog, email hello@greendog.pet before you order and we'll work out the spec together.
Any breed · Any specThe Cotswold Heritage leather sighthound collar sits within the 38mm to 43mm band; it isn't cut to a single fixed width. Diagrams are drawn to scale relative to one another, not at life size.
Step 5, optional
If there's a collar or lead your dog already wears happily, you can copy its fit exactly. Here's where to put the tape.
Measure from the end of the clip fitting to the start of the collar material.
Clip end → material startMeasure from the base of the buckle to the hole your dog actually uses, not the last hole punched.
Buckle base → the hole in useLay the lead flat and measure from the tip of the clip to the end of the handle. That total is the length to order.
Clip tip → handle endMeasure slider to handle end. I add 30 cm for the slip loop automatically, so please don't add it yourself, or the lead arrives 30 cm long.
Slider → handle end · +30 cm added hereA Note From the Maker
Ed, Founder · hello@greendog.petI'm not a faceless drop-shipper. I'm Ed. Everything here is made by hand in Britain, to one standard, and my name is against it. When you get in touch, you're talking to the person answerable for your piece.
The Guarantee
Here is exactly what you can expect, in the same words I'd use on the phone. There is no small print underneath it.
For non-personalised pieces there is a 30-day return window. The law gives you 14 days to cancel; I extend it to 30. Email me and I'll walk you through it.
Full refund availableGoods made to your specification are exempt from the statutory cancellation right, so personalised items can't come back for a change of mind, because I can't resell them. I'd far rather get it right first time: read the measuring guide above, or message me before you order and I'll talk it through. If it does not fit when it arrives, tell me and I will adjust or remake it. If I got the size wrong, I cover the postage both ways. If the measurement turned out not to suit your dog, the postage is yours. Message me within 14 days of delivery. If anything arrives faulty, damaged or not as described, that's on me: I'll repair, replace or refund it and cover the postage.
Size exchanges availableEvery clasp, ring and buckle is load-tested by the fitting's manufacturer. If a component fails within the first twelve months, I repair or replace it, with parts and return postage covered.
Twelve-month hardware guaranteeHardware Promise
Every fitting is load-tested by the fitting's manufacturer. If something does fail, this is what happens next.
Day 1 → 12 months
If hardware fails inside twelve months, send it back to me. I cover your return postage, and the repair or the replacement.
After 12 months
A collar worn daily for a year has earned continued support. Past twelve months I'll replace worn parts at cost plus postage, and tell you exactly what it needs before I start.
Always
Email hello@greendog.pet. There is no ticket system between us.
Transparent Policies
No hidden conditions. The whole picture, in one place.
Policy Summary
Last updated August 2026
Non-personalised pieces can be returned within 30 days for a full refund. The item must be unused and in original condition.
Personalised items are made to your spec, so the statutory cancellation right doesn't apply. A size exchange service is available, and your rights if an item is faulty are unaffected.
If it does not fit when it arrives, tell me and I will adjust or remake it. If I got the size wrong, I cover the postage both ways. If the measurement turned out not to suit your dog, the postage is yours. Reading the measuring guide before you order is the surest way to avoid it.
Within twelve months: fully covered, and I pay the return postage. After twelve months: worn parts replaced at cost plus postage. Every fitting is load-tested by its manufacturer.
Common Questions
Wrap a soft tape measure around the middle of the neck, roughly halfway between the base of the skull and the top of the shoulders, let it lie flat, then slide two fingers underneath. The reading with your fingers in place is the measurement to order from. If you have no helper, measure snugly with nothing under the tape and add 1.5 inches (about 4 cm).
I'd rather you didn't. Leather, BioThane®, paracord and rope all stretch and compress differently over time, so an old collar tells you what that collar has become, not what your dog measures. Go back to the dog. The one exception is matching the fit of a collar you already love, and there's a section above on exactly how to do that.
Take the larger of the two. Every adjustable collar is verified on the sizing pyramid before it is packed, and the tightest hole in a range fits the smallest neck in that range, so the larger size starts snug and gives you room as the coat changes. If you're unsure, email the measurement to hello@greendog.pet and I'll tell you which size I'd make.
The classic wool weave is 34mm on a 19mm strap. The sighthound wool weave is 43mm on a 19mm strap. The Cotswold Rambler is a 38mm BioThane® body on a 19mm strap. The Mini wool weave is 20mm on a 16mm strap. Paracord and BioThane® adjustable collars are 19mm throughout. Straps come in leather or BioThane® on every wool collar.
Because it doesn't adjust. The Greenwich Yarn slip-on and clip styles are made to a fixed internal circumference and cannot be resized afterwards, so the collar has to pass over the widest part of the head. Measure around the ears, not the neck. Get that wrong and the collar won't go on at all.
Both. The adjustable collar sizes are set in inches and every size chart on this page shows the centimetre equivalent alongside. The Greenwich Yarn range and the BioThane® leads are ordered in centimetres directly. Send me whichever you have and I'll convert it.
If it does not fit when it arrives, tell me and I will adjust or remake it. If I got the size wrong, I cover the postage both ways. If the measurement turned out not to suit your dog, the postage is yours. On a non-personalised piece you can also simply return it within 30 days for a full refund. If anything arrives faulty, damaged or not as described, I'll repair, replace or refund it and cover the postage.
Every clasp, ring and buckle is load-tested by the fitting's manufacturer. If a component fails within twelve months I cover your return postage and repair or replace it. After twelve months I'll replace worn parts at cost plus postage, and tell you what it needs before I start.
Dog Is In The Detail™