Airbrush nozzle size: match the head to the job

You are on a kit page that prints 0.2 mm, 0.3 mm and 0.5 mm, choosing which airbrush nozzle size belongs on a primer coat, a model and a fine line. The number is the hole the paint has to pass. The needle, the nozzle and the cap for that hole have to be the set sold for that gun, and the included-components line has to name the sizes the bullet promised. A larger number moves more liquid. It does not, by itself, make a finer model or a safer face spray.

We compared the nozzle lines on twelve amazon.co.uk listings in our airbrush set comparison, using maker notes from Iwata, Stardustcolors, GraphicAir, Scale Model Shop and The Airbrush Company. Prices and star lines are those listings in October 2026. We did not run a spray test, and we did not unpack the cartons. A qualifying purchase through our links can earn a commission at no extra cost to you.

In short

Choose the airbrush nozzle size for the coat, then confirm that the needle, nozzle and cap for that millimetre are in the box. Name 0.3 mm for general model colour if you can keep only one size. Keep 0.5 mm for primer and wider areas when the set really includes it, and treat 0.2 mm as a nozzle for thinned paint.

What an airbrush nozzle size measures

An airbrush nozzle size is the diameter of the orifice, in millimetres, at the tip where paint and air meet. Iwata’s basics page treats a larger head as a head that moves more liquid, and a size change as a change of needle, nozzle and cap together. A 0.5 mm opening can pass a thicker mix than a 0.2 mm opening. The millimetre on the packet is the hole, not a promise about how wide the coat will be at 15 cm.

The familiar trio is 0.2 mm, 0.3 mm and 0.5 mm. Liwankaqi prints 0.35 mm and Ykall prints 0.4 mm, each as a single head. Stardustcolors’ beginner notes run from about 0.15 mm to 0.5 mm, finer at the small end than anything these twelve listings print. A £19.94 cordless gun and a £69.99 corded kit can both be the wrong hole for the coat.

How 0.2 mm, 0.3 mm and 0.5 mm split the work

If one size has to be named for general model colour, name 0.3 mm. George Dent’s UK modeller’s guide treats a 0.3 mm Iwata as the finer general gun, and a 0.5 mm Iwata as the workhorse for primer, liveries and clear coats. The pounds on that 2019 post are stale. Keep 0.5 mm for primer and larger areas when the set really includes that head.

MEEDEN’s listing stops at a 0.5 mm needle, with twelve 30 ml acrylics for paper, canvas, wood and similar craft surfaces, and an ASTM D-4236 line. That label is an art-materials note, not a miniature primer and not food. Treat 0.2 mm as a thinned-paint nozzle. Stardustcolors pairs a 0.3–0.5 mm nozzle with a liquid-cream mix, and a 0.15–0.20 mm nozzle with a milk-like mix. Scale Model Shop’s spattering guide says primer blocks a small nozzle, and overtightening the tip splits the threads. A cup that flowed at 0.5 mm can stop at 0.2 mm.

Needle, nozzle and cap as one set

A size change means the needle, the nozzle and the cap that belong to that size, fitted as a set. A 0.5 mm needle in a 0.3 mm nozzle is a mismatch, and a lone 0.3 mm nozzle from a different gun is a different part. GraphicAir says to inspect the tip with a magnifier and to leave it fitted unless it is damaged. Cross-threading, or winding the tip down harder to cure a clog, splits these nozzles. A cracked nozzle looks like a clog and will not clear with thinner.

Gravity feed does not change the hole. Timbertech and Rosemary & Co describe a cup on top and a dual-action trigger. These listings do not claim that the same millimetre from another brand will seat.

What these UK listings print

Five of the twelve files claim 0.2 mm, 0.3 mm and 0.5 mm: Powate, SHJKBST, Roizefar, Timbertech and Rosemary & Co. Timbertech ABPST05, our top pick, was £69.99 with 4.5 from 6,320 amazon.co.uk reviews. The bullets mount 0.30 mm and add 0.20 mm and 0.50 mm, plus a gauge, a water trap, autostart at 3 bar and autostop at 4 bar. The spec says 220 V and does not say BS 1363. One review reports a Euro two-pin plug. At 4.33 kg it is the heaviest set here. The spec tank of 7 ml clashes with a review that says there is no tank, so the motor runs while you spray.

Rosemary & Co was £22.65 with 4.4 from 119 reviews. It lists all three sizes, and the hose and compressor are not included. The thread is 1/8 inch BSP male, and 55 psi is a limit on the gun. Powate TA101 was £52.99 with 4.5 from 103 reviews: the highlight says three sizes, and the included line lists 0.5 mm and 0.2 mm only, still naming the compressor, hose, adapter and oil-water separator. SHJKBST was £39.99 with 4.0 from 39 reviews, and Roizefar was £55.99 with 4.4 from 71 reviews. Both put the sizes in the bullets and Air Hose in the components field.

Single-size pages are a different buy. BURNTOP prints 0.3 mm and 48 psi, black at £19.94 with 3.8 from 204 reviews and green at £20.99 with 3.8 from 203, both model BURNTOP-PQ. Aloxina is 0.3 mm at £20.99 with 3.7 from three reviews, and names a USB cable. CHAMSUREUK is two 0.3 mm nozzles, a spare of the same size, at £27.99 with 4.7 from eight reviews. Liwankaqi is 0.35 mm at £22.99 with 3.5 from six reviews. Ykall is 0.4 mm at £28.49 with 4.0 from 123 reviews. MEEDEN is a 0.5 mm needle at £74.95 with 4.4 from 124 reviews, and 21 psi in the spec.

Primer, models, nails and makeup

Model colour wants regulated air and a nozzle at 0.3 mm or below, with 0.5 mm where the listing offers it for primer. A lone 0.3 mm cordless gun cannot swap heads. One CHAMSUREUK review doubted 0.3 mm for car bodies from 1:43 to 1:18. If 0.3 mm is the only head, thin and strain the primer until it passes. Those kits are sorted for miniatures on the airbrush kit for models page.

Nail comments on the cordless files are mostly 0.3 mm, for a short colour session away from a socket. Liwankaqi prints about 40 minutes. We did not time that claim, and these pages do not show a gauge. A corded kit with a stated pressure unit is the better tool when you are priming several models. Cable versus battery is on the corded or cordless airbrush page.

Makeup can need only a few psi, The Airbrush Company notes, so a high PSI headline is a poor face-spraying recipe. Powate’s bullets say 25, 30 and 40 PSI while the spec says 12 with no unit. Both BURNTOP files print 48 psi. A 0.5 mm hobby head does not become a wall sprayer.

When the bullet and the box list disagree

Shop the included-components line, then open the bag. A three-size title can name two heads, or only a hose. Ykall’s title says a compressor is included, and one review says it did not arrive. The nozzle on that page is 0.4 mm either way. On the day the kit arrives, work through the nozzle in this order.

1. Match every needle, nozzle and cap to the included-components line before you fit anything.
2. Fit 0.3 mm for general model colour, 0.5 mm for primer and wider areas, and 0.2 mm only for paint thinned for that hole.
3. Seat the nozzle, then spray card. If it spits, thin or strain the paint before you touch the threads again.
4. If a size the page described is missing, raise that with the seller as a description mismatch. This article is not legal advice.

The plug and the moisture trap sit on the airbrush kit buying guide. A matched 0.3 mm set that is actually in the box will do more for a first model than a three-size banner the components line does not support.