Tip sizes range from 0.7 mm up to 1.6 mm. Some listings use numeric sizes (for example, 0.7 mm) while others use non-numeric labels such as "Medium" without a specific millimeter measurement.
The listings show a wide variety of colors: black, blue, red, green, pink, purple, lime (lime green), turquoise, orange, brown, navy/marine blue, apricot orange, salmon, burgundy, lavender, and assorted multicolor packs.
Erasable pens use thermo-sensitive ink that can become colorless when exposed to heat (noted at temperatures above 140°F) and can reappear when cooled. Manufacturers caution these inks are not recommended for legal or official documents.
Pack sizes shown in the listings include 3, 4, 5, 6, 8, 12, and 15 pens per pack.
Descriptions mention rubberized or contoured grips and hexagonal barrels, all intended to provide a firmer, steadier hold.
Several listings label 0.7 mm as "Fine." The label "Medium" also appears in some listings; in one case a 0.7 mm tip is called "Medium," and another listing uses "Medium" without giving a numeric size, indicating inconsistent labeling across products.
Descriptions commonly note quick‑dry or smear‑resistant gel inks; examples include statements that ink "dries 3x faster for reduced smearing," dries "in as little as five seconds," and gel formulations with "no smear, no bleed" technology.
Some descriptions note pen barrels made from renewable or reclaimed materials (wheat straw) and packaging printed on FSC-certified paper using soy-based ink.
