Cosmetic Bottle Neck Size: What 461 Formats Actually Use
If you already have the pump, the cosmetic bottle neck size is the number that decides whether the bottle is even a candidate. It is the one dimension that has to be agreed before anything else, because a pump that does not fit is not a small problem — it is a different bottle. We publish a neck value on 461 of the 514 bottle formats in our range and leave it blank on the other 53, and the distribution across those 461 is far more concentrated than most buyers expect.
One limit stated up front, because it is the most useful thing on this page. Our catalogue publishes diameter only. It does not publish a thread code. So when you read “24 mm” below, that is a measurement, not a finish specification — the thread pitch and profile behind it have to be confirmed against the component itself, not assumed from the number. Anyone who tells you a diameter alone settles pump compatibility is skipping the step that actually causes failures.
The cosmetic bottle neck size distribution across 514 formats
Four diameters carry almost everything:
| Neck diameter | Formats | Share of the 461 |
|---|---|---|
| 24 mm | 166 | 36% |
| 20 mm | 116 | 25% |
| 43 mm | 54 | 12% |
| 28 mm | 24 | 5% |
| 18 mm | 19 | 4% |
| 13 mm | 17 | 4% |
| 32 mm | 15 | 3% |
| 30 mm | 9 | 2% |
| 33 mm | 8 | 2% |
| 36 mm | 6 | 1% |
| 15 further diameters | 27 | 6% |
24 mm and 20 mm alone account for 282 of the 461 — 61%. Add 43 mm and 28 mm and you are at 360, or 78%. The long tail is real but thin: fifteen further diameters share 27 formats between them, and several of those (12, 14, 27, 45, 55, 68 mm) appear exactly once in the whole catalogue. That tail is where a mismatched component is most likely to become a dead end, because the replacement options at 55 mm are not the replacement options at 24 mm.
The 53 formats with no published neck value are worth naming rather than hiding. Some are cream jars, where the relevant interface is a lid thread rather than a pump neck; others are simply not documented to that level in the source catalogue. If a format you are considering is in that group, treat the neck as an open question to be answered from the drawing, not as a value we have and are withholding.
Lotion pump neck size and spray bottle neck size are not fixed by the bottle
The assumption buyers usually arrive with is that neck diameter encodes product type: sprayers on one size, lotion pumps on another. The data does not support that. What it shows is overlap in both directions.
| Neck | Formats | Where it actually appears in the catalogue |
|---|---|---|
| 18 mm | 19 | PET spray 11, sample bottles 3, dropper bottles 3, PETG bottles 2 |
| 20 mm | 116 | PETG spray 41, PET spray 37, PET bottles 11, PETG dropper 8, lotion 6 |
| 24 mm | 166 | PET spray 80, PET lotion 26, PETG lotion 18, cleansing oil 6, PET bottles 5 |
| 28 mm | 24 | PETG lotion 6, PET lotion 5, mouthwash 3, spray 3, HDPE lotion 3 |
| 43 mm | 54 | PET foam 43, PETG foam 6, HDPE foam 3, foam 1, HDPE bottles 1 |
Read the 24 mm row twice. It is the most common neck in the range, and within it spray bottles (80) outnumber lotion bottles (44) by nearly two to one — but it is also where every PETG lotion bottle of that size sits. A lotion pump neck size is therefore not one diameter: lotion pumps appear at 20, 24 and 28 mm. The same is true in the other direction, and a spray bottle neck size is not one diameter either — 20 mm is a spray neck first, with plain PET bodies and dropper bottles behind it, while 18 mm is mostly spray and 43 mm is almost entirely foam.
Meanwhile the functional words in the catalogue — spray 51 groups, lotion 38, foam 24, dropper 9, squeeze 8 — describe what the finished pack does, not what the neck is. The practical consequence is a change of order: choose the neck first and the function second, not the other way round. If a formula needs a foamer, 43 mm is where our range concentrates, and the bottle body then gets chosen around it. If it needs a spray, 24 mm and 20 mm are both live and the choice is about dose and body size rather than about the actuator.
Why a cosmetic bottle neck finish is not a fit guarantee
Three specific gaps, all of which we would rather you know before sampling than after.
Diameter is not a thread. A cosmetic bottle neck finish is a combination of diameter, thread pitch, start count and bead geometry, and the catalogue publishes one of those four. A 24 mm neck from one mould and a 24 mm neck from another can differ in the other three. The pumps and caps in our own range are matched to the bottles in our own range, and that matching is a tested pairing, not a deduction from the number.
The same diameter across materials is not the same neck. Wall thickness and neck finish differ between polymers at the same nominal diameter, and a 24 mm PETG bottle will not necessarily accept what a 24 mm PET bottle does.
The diameter is usually the neck opening, not the finished pack. Capacity and neck size are independent across this catalogue: 50 ml (62 formats), 100 ml (57), 30 ml (48), 300 ml (38), 150 ml (36) and 200 ml (31) all appear, and the same capacity shows up at more than one neck. A 100 ml bottle is not a neck size; it is a volume that could be built on several.
PET bottle neck size is not PETG bottle neck size
This is the gap buyers hit most often, so it gets its own section. Our 514 formats are predominantly PET (268) and PETG (149) — together 81% — with PP (26), HDPE (21) and single-digit counts of ABS, PE and LDPE behind them. Two rows also carry a composite material note, and one carries a note about jar body and lid materials rather than a single value.
The consequence is that a PET bottle neck size and a PETG one are the same number describing two different material systems, and the two are not interchangeable at the pump end. PET and PETG differ in shrinkage, stiffness and how a thread forms, and the catalogue does not publish which of them a given pump was proven against. If a project fixes the neck by diameter alone and then chooses material for cost or clarity reasons, the fit question reopens — and it reopens at the sample stage, which is the expensive place to find out.
There is also a documentation gap worth stating: 32 of the 514 rows carry no material value at all. Those are not necessarily non-PET formats; they are rows where the source catalogue left the field blank. Treat a blank as unknown, not as a default.
Where the numbers come from
Every format is published as a plate carrying its source dimensions, so the neck value can be read against the drawing rather than taken on trust. All 514 are on the bottles and jars page. The same catalogue is the source for the material breakdown of our pen range and for solid pens and sunscreen sticks.
These formats come from the catalogue of a manufacturing partner in our network and are made to order — we quote per project rather than from a stock list, and order quantity is confirmed project by project. If a cosmetic bottle neck size is the thing you are trying to match, send us the pump or cap you already have and its measured thread rather than the diameter alone; we will work from the mating part, not from the number. Start an enquiry → And if you want to see how a fit gets checked on our side before a lot ships, our inspection file includes the lots that were held back, not only the ones that passed: read the file →