Chalkola 6 White Liquid Chalk Markers for Window Blackboard (1mm, 3mm, 6mm)

If you've never bought liquid chalk markers and don't know which tip size you want, this is the set to start with. Six white Chalkola markers across three tips: 1mm extra fine, 3mm fine and 6mm bold. About $15, 4.5 stars from 332 ratings.

The listing doesn't say how the six are split between the sizes. Two of each would be the obvious guess, but check the product photos if it matters to you.

Which tip does what

The 1mm is for small print: prices, dates, and the outlines and shadow lines on bigger letters. The 3mm handles everyday handwriting, so shopping lists and a weekly calendar. Save the 6mm for headlines and anything you'll fill in solid.

After a few weeks you'll know which one you reach for. Then you can buy a single-size pack next time: Chalkola sells all-1mm and all-3mm white 6-packs at the same price.

Liquid chalk and chalkboards

Here's the catch with every liquid chalk marker. Chalkola says the ink erases wet or dry from non-porous surfaces such as glass and mirrors, and becomes permanent on porous surfaces like wood. A chalkboard can be either. Porcelain and sealed boards wipe clean. Many painted ones are porous, and liquid chalk can ghost or stain them.

Before you write anything you care about, test a corner. Let it dry fully, then wipe with a damp cloth.

The Chalky Crown magnetic fridge board is meant for liquid chalk and is a good place to try all three tips. The Loddie Doddie framed wall board doesn't say whether it takes liquid chalk, so test it. Our chalkboard guide has more boards, sorted by where they hang.

The rest of the listing

Chalkola pitches these at teachers, students, artists, offices and restaurant owners. Suggested uses include wedding signs, storefronts, milestone boards, menus, LED boards, contact paper, mirrors and car windows. It also says the tips stay fray-free under heavy use. With 332 reviews that's a smaller track record than Chalkola's colored sets, which have thousands.