Common point sizes shown in listings are 0.7 mm, 1.0 mm and 1.4 mm. Some product descriptions also use the label “Medium,” which appears alongside 0.7 mm or 1.0 mm in different listings.
Some listings highlight recycled or bio-based materials, such as pens made from 78% ocean-bound or recycled plastic, barrels with up to 90% bio-based plastic, and paperboard packaging made from 100% recycled content. At least one model also notes CO2-neutral production.
Barrels are most often plastic (including durable or semi-clear and recycled plastics). Some pens feature matte or soft-touch finishes, and a few listings note metal construction elements or stainless-steel tips.
Listings vary: some pens are described as refillable or compatible with larger-capacity refills, and others are promoted as long-lasting. Many product pages note refill compatibility for specific models, while some items do not specify refill options.
Many retractable pens include clips—metal or sturdy plastic—for attaching to notebooks or pockets. The retractable mechanism eliminates the need for a cap, making the pen ready with a single click.