In brief
The Mini Mill Slim+ is Hario's small, entry-level ceramic burr hand grinder. Hario USA sells it as the Mini-Slim+ and Hario UK as the Mini Mill PLUS; both list the same product number. It is the Mini Mill with a redesigned handle and shaft coupling.
It is built for one person making one cup. Hario lists 24 g of grounds capacity, and the tapered body fits a small hand. Hario pitches it as a beginner's grinder for travel or home.
The trade-off is grind quality at the coarse end. Two reviewers found coarse grinds uneven, which matters for French press. For pour-over and AeroPress, it is a real step up from a blade grinder.
What it does well
- Among the cheapest branded burr hand grinders, per Long & Short
- Slim, light body that Greenplantation says survived its trips unscathed
- The Plus handle and shaft coupling stop the crank popping out, per Hario and Greenplantation
- Greenplantation found the ceramic burrs easy to take apart for cleaning
Where it falls short
- Coarse grinds come out uneven, according to both Greenplantation and Long & Short
- Hario lists only 24 g of grounds capacity: one or two cups
- Greenplantation's grounds container cracked on its outer wall when dropped
Specs
- Type
- Hand grinder, Conical burrs
- Burrs
- Conical, ceramic
- Adjustment
- Stepped click knob under the burrs
- Capacity
- 24 g of grounds (Hario's figure)
- Size
- 150 × 72 × 220 mm
- Materials
- Stainless steel shaft and handle, resin and polypropylene body
- Power
- Hand
Where to start on the dial
Pour-over 8 clicksAeroPress 6 clicksMoka pot 4 clicks
Every method on the settings chart →On this page · 5 sections
What it does well
It is cheap. Long & Short calls it "still one of the cheapest commercially branded grinders out there," and says it undercuts the Porlex. For someone trying fresh grinding for the first time, the cost of being wrong is small.
It travels well. Greenplantation calls it a "handy travel companion" that "survived all the trips unscathed." The body is mostly plastic and light, and it narrows in the middle for grip.
The Plus handle fixes an old annoyance. Hario says the new handle and shaft coupling give better traction. Greenplantation found the handle now stays in place "without popping out when grinding," and Long & Short calls the reinforced arm "a notable improvement."
Where it falls short
Coarse grinds are uneven. Greenplantation says the irregularities are "particularly apparent in coarse grinds such as on the French Press." Long & Short agrees that inconsistency "tend[s] to show more with the coarser grinds."
Capacity is small. Hario's 24 g figure covers one large mug or two small cups. Anyone brewing a full carafe will grind twice.
The plastic body is light but not tough. Greenplantation's grounds container cracked on its outer wall when dropped, though glue fixed it without loss of function. As with any hand grinder, Long & Short notes it "requires more patience and muscle" than an electric one.
Who should buy it, and who shouldn't
Buy it if you brew one cup of pour-over or AeroPress, want to stop buying pre-ground, and want to spend as little as possible. It also suits a light travel kit or a second grinder for the office.
Skip it if you brew French press or cold brew most days. Skip it too if you want espresso. Greenplantation used it for moka pot, AeroPress and V60.
If you can spend more, a steel-burr hand grinder will give a more even cup.
How it compares
The Timemore C3 is the usual next step up. BrewMark's finder rates it higher for filter, and it also travels. The Hario Mini Mill Slim+ vs Timemore C3 page shows how the dials line up.
The Hario Skerton Pro is Hario's bigger hand grinder, with a glass bowl. Hario lists 100 g of grounds capacity for it, against 24 g here. Pick the Skerton Pro for home and the Slim+ for a bag.
The Porlex Mini II is the other classic travel grinder. It has a stainless steel body and fits inside an AeroPress, at a higher price. If you plan to move toward espresso later, see Hario Mini Mill Slim+ vs KINGrinder K6.
Owning it
Cleaning is simple. Greenplantation says the ceramic burrs are "easy to disassemble when cleaning the grinder." The hand grinder cleaning guide walks through the steps.
Hario USA links a product manual from the product page but lists no warranty or spare parts there. Treat the grounds container gently, since that is the part Greenplantation saw crack.
The settings chart on this page gives a starting click count for each brew method. Counting clicks from fully closed works best, as the zero point entry explains. If a recipe quotes another grinder, the grind converter translates it.
Also worth a look
Sources
- Hario USA: Mini-Slim+ Ceramic Coffee Mill
- Hario UK: Mini Mill PLUS Ceramic Coffee Grinder
- Hario USA: Skerton Pro Ceramic Coffee Mill
- Porlex: Mini Grinder II
- Greenplantation: Hand grinder Hario Mini Mill Slim review
- Long & Short: Hario Mini Mill Plus Grinder, the review
By Jeff Gluck · Checked 2026-10-21