Listings show tip labels from Ultra Fine to Medium with these numeric sizes: Ultra Fine (0.38 mm), Extra Fine (0.5 mm), Fine (0.7 mm) and Medium (0.7 mm). Note that some listings list Fine and Medium with the same numeric size—check the product details if you need a distinct tip width.
Some listings claim ink dries in as little as five seconds; others advertise multiple-times-faster drying (for example, “Dries 3x faster”). Several products describe smear-resistant or quick-dry formulas designed to reduce smearing, including features targeted at left-handed writers.
Pack sizes shown in the listings include 2, 3, 4, 5 and 22 pens per package.
Some pens use renewable or reclaimed materials (for example, wheat straw) for the barrel to reduce plastic use, while others use metal barrels for a sleeker, more premium look and feel.