Best First Collar for a Puppy, and When to Size Up
The short answer
A puppy's first collar should be light and easy to release with one hand, which in practice means a 5/8 inch strap with a fast-release buckle in the smallest size that still leaves two fingers of room. The Leatherius personalized leather puppy collar – distressed cowhide, 5/8 inch, XXS from 7 inches, about $36 with the name engraved free – is the one we point new owners toward. Plan to size up around the four to six month mark for a medium breed, and twice in the first year for a large one.
The rest of this page is the sizing timeline and the fit checks that keep a growing puppy safe.
What the first collar needs
- Light. A puppy who barely registers the collar accepts it in a day. A heavy strap with a big buckle gets scratched at for a week.
- Narrow. The 5/8 inch width, which Leatherius calls the smaller buckle option, fits necks from 7 inches upward.
- Fast to open. A click-release buckle comes off in one motion if the collar snags on a crate wire or a chair leg.
- Named. A puppy who slips out of a door needs identification on day one, before the microchip registration is even confirmed.
Leatherius engraves three lines free on every collar. On a 5/8 inch strap you get 12 characters per line, which is enough for the puppy's name on one line and a mobile number on the next.
Sizing table for the first year
| Neck measurement | Leatherius size | Width | Typical stage |
|---|---|---|---|
| Under 8 in | XXS 7–8 in | 5/8 in | Toy breeds; 8-week puppies of small breeds |
| 8–10 in | XS 8–10 in | 5/8 in | Most 8 to 12-week puppies |
| 9–12 in | S 9–12 in | 5/8 in | Three to five months, medium breeds |
| 11–16 in | M 11–16 in | 5/8 in | Five to nine months, medium breeds |
| 13–17 in | L 13–17 in | 1 in | Large breeds moving to an adult collar |
| 16–24 in | XL 16–24 in | 1 in | Adult large and giant breeds |
Leatherius sizes describe the total circumference of the collar, so the puppy's neck must measure smaller than the size on the label. When a measurement falls between two sizes, take the larger. The measuring method is in our dog collar size chart.
When to size up
Measure the neck every two weeks while the puppy is growing. The trigger to move up is simple: you can no longer slide two fingers flat between the collar and the neck at the loosest comfortable setting.
Rough expectations by size of dog. A toy breed may stay in XXS or XS for life. A medium breed usually moves from XS to S around four months and into M by eight or nine. A large breed often runs XS to S to M inside the first year, then into the 1 inch widths as an adult. Growth spurts arrive faster than most owners expect, which is why the two-week check beats a calendar reminder.
Two warning signs mean size up immediately: hair thinning in a band where the collar sits, or the puppy scratching at the same spot repeatedly. Both point to a collar that has become tight. There is more on skin contact in our guide to collars for dogs with sensitive skin.
Should the first collar be leather?
Leather has one clear advantage for a puppy: it softens against the neck within two or three weeks, so it feels better at month two than it did on day one. It also survives being chewed by a littermate rather better than webbing does. The counterargument is cost, since a puppy will outgrow whatever you buy.
The way around that is to spend lightly on the growth collars and properly on the adult one. Leatherius puppy collars are about $36. When the dog reaches adult size, the classic belt buckle collar at about $56 is the one that stays for years. Our post on how long leather collars last explains what you get for the step up.
Introducing it
Put the collar on before a meal so the puppy associates it with something good, and leave it on for short stretches at first. Supervise the first few sessions, especially in a crate, where any collar can catch. Take it off at night for the first week while the puppy adjusts. The full puppy range sits in the dog collar collection, and the walking gear is in all dog products.
FAQ
What size collar does an 8-week-old puppy need?
Most 8-week puppies measure between 8 and 10 inches at the neck, which is an XS in the 5/8 inch width. Toy breeds may need the XXS at 7–8 inches. Measure rather than guess, since breed averages vary widely at this age.
How tight should a puppy collar be?
Two fingers should slide flat between the collar and the neck. Tighter risks rubbing as the puppy grows, and looser lets a determined puppy back out of it during a walk.
How often will I need to buy a bigger collar?
A medium breed usually needs two collars in the first year, a large breed often three. Measure the neck every two weeks through the growth phase and move up when two fingers no longer fit.
Can a puppy wear a collar all day?
Once the puppy is used to it, yes, with supervision in a crate where a collar can snag. Remove it at night during the first week while the puppy adjusts, then leave it on so the identification is always there.
