Updated October 2026
The best espresso basket is a ridgeless precision basket that matches your dose to within 1 g, in a 58 mm portafilter. Get that right and you can use the full range of doses and ratios, grind a little coarser, and extract more evenly. These nine rules explain why, and which baskets I use myself.
A basket looks like a minor part, but it sets how much coffee you can dose, how much flow resistance the puck has, and how evenly water moves through it. It is one of the cheapest changes you can make to an espresso setup, and one of the most effective.
Pick the basket size that matches your dose to within 1 g (the smaller one if two fit), choose a ridgeless precision basket such as VST or IMS, use a 58 mm portafilter if you can, and avoid pressurised and single baskets.
Each rule links to the full explanation further down the page.
1. Match the basket size to your dose
2. Choose a precision basket, not the stock one
4. Go ridgeless
5. A 58 mm portafilter is worth having
6. Never use a pressurised basket
RULE 1
To make great-tasting espresso you need the full range of ratios, from 1:1 to 1:4, and that means using the full range of doses, roughly 14 g to 25 g.
Yield = dose × ratio. A light roast that wants a 1:4 ratio needs an 80 g yield from a 20 g dose, which many espresso machines cannot deliver in a sensible time. Drop the dose to 14 g and the yield falls to 56 g, which is far more achievable.
But putting a 14 g dose into a 20 g basket creates four problems:
A thinner coffee bed gives less flow resistance, so your shot runs faster. You can grind finer to slow it down, but the water still needs some bed to pass through. If the coffee is too fine, the tamped grounds can pack so tightly that the machine cannot push water through, giving a backed-up machine or an over-extracted, bitter shot.
The headspace has to fill with water before pressure can build in the puck. While it fills at 0 bar the puck is already absorbing water, which is a pre-infusion effect. A bigger headspace means a longer pre-infusion, so the flow runs faster at the end, and it leaves you with soggy pucks.
With a shallower bed and less resistance, you need fewer holes to keep the resistance up.
With a shallower bed, less resistance and a finer grind, the holes must be smaller to maintain resistance and contact time.
The better option is a 15 g VST precision basket. It has fewer and smaller holes than a 20 g basket, which raises the resistance so you do not have to grind as fine to reach your extraction time, and it solves the headspace problem.
At the other end of the roast spectrum, a very dark roast that wants a 1:1 ratio gives only a 20 g yield from a 20 g dose. A 25 g VST precision basket lets you dose 25 g and yield 25 g. It has bigger and more numerous holes than the 20 g basket, so resistance and grind size stay roughly constant.
Your dose should be within 1 g of the basket size to get the right headspace. When two baskets would fit, for example a 19 g dose in either an 18 g or a 20 g basket, use the smaller one, because you will not have to grind as fine.
A set of precision baskets in 15, 18, 20, 22 and 25 g covers the full range of ratios, doses and yields. The chart below shows which one to pick.
CHEAT SHEET
Choose the basket that matches your dose to within 1 g. These are the doses each size typically covers, with an example of what that means for yield.
15 g
Doses of about 14–16 g. Best for long ratios on light roasts: a 14 g dose at 1:4 gives a 56 g yield.
18 g
Doses of about 17–19 g. The all-rounder: 18 g at 1:2 gives 36 g out.
20 g
Doses of about 19–21 g. Room for 1:2 to 1:3: 20 g at 1:2.5 gives 50 g out.
22 g
Doses of about 21–23 g. A good step up for darker roasts at shorter ratios: 22 g at 1:1.5 gives 33 g out.
25 g
Doses of about 24–26 g. For very dark roasts at 1:1: 25 g in, 25 g out.
Where two baskets overlap, choose the smaller one. You will not have to grind as fine.
RULE 2
The shape of the basket and of its holes has a significant effect on extraction and flavour. A precision basket has far less hole-to-hole variability than the standard basket that comes with most machines, and the difference in extraction level and uniformity is appreciable. It is a small investment that can make a huge difference, and it improves the overall taste of your espresso as well as the extraction.
These are the main makers. Check that the size, diameter and ridge style suit your portafilter before you buy.
The one I use (see rule 3). VST precision filter baskets.
The IMS competition baskets are a widely used alternative.
Pullman filter baskets are the other brand worth a look.
Strada filter baskets from La Marzocco.
A newer holes-to-the-edge design. See rule 9.
RULE 3
My choice was the VST Precision baskets. Each is made for a specific dose weight, and the size, number and placement of the holes change across the sizes so extraction stays consistent. VST baskets produce significantly more consistent results than original-equipment baskets (see Clive Coffee on whether portafilter baskets matter).
VST Precision Filter Baskets come in 7, 15, 18, 20, 22 and 25 g capacities.
100% of the holes in every filter are measured against minimum and maximum limits, with hard limits on area and diameter, to a precision better than ±30 µm. Holes are also checked for circularity, placement, area and blockage.
Filters are matched for total open area to ±5%, so group-to-group results are identical. Typical filters vary from −50% to +100%.
The hole pattern is centred to ±1.0 mm and oriented for uniform extraction through the whole puck.
A wide outlet angle prevents clogging, and the anti-wear design keeps extraction consistent for the life of the product. The basket is 20% heavier than a standard filter, with a highly polished inside and a profile that knocks out cleanly.
These figures are VST’s own specifications.
RULE 4
Ridged baskets have a groove in the side wall that a spring in the portafilter locks into, which holds the basket in place. Ridgeless baskets have smooth walls, so they generally need a stronger spring to stay put when you knock out a used puck.
Smooth walls. The puck knocks out cleaner and there is no groove to affect the flow of water through the puck. They need a stronger portafilter spring, so check the fit.
A groove in the wall holds the basket in the portafilter, but the ridge can affect fluid flow in the puck and makes knock-out less clean.
Ridgeless is the one to go for.
A ridgeless basket must sit snugly in your portafilter, so buy the size and diameter made for it, and make sure your tamper matches the basket.
RULE 5
Different espresso machines use different portafilter diameters. The most common size is 58 mm, but there is 49 mm and everything in between. At a standard 8 bar, a larger basket has more extraction force applied to the bed.
Pressure is force per unit area, so at the same pressure a larger surface carries a larger total force. Taking the bed of coffee as a flat surface at 8 bar (800 kPa, or 800 kN/m²):
Area π × 0.029² = 0.00264 m². Force = 800 × 0.00264 = 2.11 kN.
Area π × 0.026² = 0.00212 m². Force = 800 × 0.00212 = 1.70 kN.
The larger portafilter is subject to a higher extraction force at the same pressure. It should also tend towards better consistency: more of the coffee is in contact with the water at the surface of the bed, there is a more direct pressure gradient through the puck, and the puck is comparatively thin, which reduces the chance of channelling.
There are also simply more basket options in 58 mm, so get a 58 mm machine if you can.
RULE 6
A pressurised basket has only a single hole in the bottom. Many have indentations that make them look like a normal basket with lots of holes, but hold one up to the light and you will see just the one.
The basket itself supplies all the resistance, which is what lets you use pre-ground coffee in an espresso machine. The cost is that you lose control of the grind and the extraction.
If you have a pressurised basket, get rid of it and get yourself a better grinder. Start with my guide to choosing a coffee grinder.
RULE 7
The single basket is designed to hold what is known as a single dose of about 7 g. It is cone-shaped, with a much smaller area at the bottom.
Single baskets are difficult to work with, prep, brew with evenly and knock out. Outside Italy they are generally not used. Choose a double basket (15 g or larger) and adjust the dose and ratio instead.
RULE 8
A bottomless, or naked, portafilter has no spouts, so the bottom of the basket is exposed. That lets you use a mirror to watch the extraction as it happens.
The main advantage is that you can see any rogue streams of espresso caused by channelling. With a manual lever machine you can act immediately, easing off the pressure to stop the spurt, then bringing the pressure gently back up.
Bottomless portafilters are also easier to keep clean, so the coffee tastes better. They can give better crema because there is less contact with the surface of a spout, and they help you develop consistent puck prep, distribution and tamping.
A bottomless portafilter does not fix a poorly prepared puck. It shows you the problem so you can fix your prep.
RULE 9
Traditional baskets are mass-produced economically by stamping thin sheets of metal, which needs a large radius at the bottom edge. The thin material combined with high-pressure extraction also keeps the holes away from the outer edge, because of stress and deformation, and the bottoms are curved to prevent deformation.
Several companies now make baskets with holes right to the edge. The aim is a more even extraction, much faster flow rates, the ability to grind finer, and higher extraction yields.
The WAFO baskets have holes to the edges and roughly 3,000 holes, for a more even extraction and a very fast flow rate. I have not tried any of these baskets yet, but the WAFO Spirit is the one I am most interested in.
Billet Basket (sworksdesign.com) and the Unibasket from Weber Workshops.
The Future of Espresso? WAFO Espresso Baskets Intro (YouTube)
WAFO vs Unifilter vs VST: Espresso Basket Comparison (YouTube)
Edge extraction, “volcano” effect and better baskets (Caffeinated Science)
IN PRACTICE
The Coffee Recipe Series is built around precision baskets. Each espresso recipe gives a dose, ratio and yield, and names the VST basket that suits that dose, so headspace and resistance stay right across the whole range of bean densities.
Measure your bean density with the calculator, find your starting recipe, and buy the basket it names. If you cannot measure, start at Recipe 61 and navigate by taste.
FAQ
Choose the basket that matches your dose to within 1 g. For most people that is an 18 g or 20 g basket, with a 15 g basket for long ratios on light roasts and a 22 g or 25 g basket for darker roasts at short ratios. If two sizes fit, use the smaller one.
A basket made to tight tolerances, with consistent hole size, placement and total open area, so water flows evenly through the puck. Standard baskets vary far more from hole to hole. VST, IMS and Pullman are the main precision brands.
In my experience, yes. VST measures every hole and matches total open area to ±5%, where typical filters vary from −50% to +100%, and the results are significantly more consistent than original-equipment baskets. It is a small cost next to a grinder or a machine.
You can, but it is better to use the 18 g basket. A dose more than 1 g below the basket size leaves too much headspace and a shallow bed, which means a faster shot and soggy pucks.
Ridged baskets have a groove in the wall that a spring in the portafilter locks into. Ridgeless baskets have smooth walls and need a stronger spring. Ridgeless baskets knock out more cleanly and have no groove to affect flow, so they are the better choice.
A basket with a single small hole in the bottom, so the basket supplies the resistance instead of the coffee puck. It lets you use pre-ground coffee, but you lose control of the grind. If you have one, replace it and get a better grinder.
No, but it is a useful tool. With the bottom of the basket exposed you can see channelling as it happens, and it helps you develop consistent puck prep, distribution and tamping. It is also easier to keep clean.
58 mm is the most common size and has the most basket options. At the same pressure a larger basket carries more total force across the bed, and the puck is thinner, which should reduce channelling. Get a 58 mm machine if you can.
I have not tried WAFO baskets yet, so I cannot say from experience. They have holes to the edge and roughly 3,000 holes, for a more even extraction and a very fast flow rate. The comparison videos linked above are worth watching. VST is the one I use.
No. Single baskets hold about 7 g, are cone-shaped, and are difficult to prep, brew with evenly and knock out. Use a double basket of 15 g or larger.
SOURCES
Espresso Machine Baskets Explained (YouTube, James Hoffmann)
Wet Coffee Puck: Is a Watery Espresso Puck a Problem? (Barista Hustle)
Espresso Headspace (Barista Hustle)
How filter baskets affect espresso taste and barista technique (Home-Barista)
Espresso Baskets: Precision vs. Regular (Robert McKeon Aloe, Towards Data Science)
KEEP READING
A well-matched basket is one part of the system. These guides cover the rest.
A pressurised basket hides a poor grinder. Here is what to look for instead.
Read the guideHow to choose specialty coffee worth dosing carefully.
Read the guideFreeze single doses so the coffee you weigh into your basket is still fresh.
Read the guideA starting recipe, and the basket to use, for every bean density.
Find your recipe
