Common colors include fluorescent yellow, pink, orange, green, purple, and blue. Some multi-color sets also list additional shades such as turquoise, marigold, lime green, light blue, sapphire, and iris.
Product descriptions commonly use named thicknesses—fine, medium, and bold—and some listings include numeric tip widths (for example, a 1.6 mm tip width is specified in at least one listing).
Look for smear-resistant or quick-drying inks—many highlighters advertise these properties. Product text commonly advises letting underlying pen or marker ink dry before highlighting to minimize smears.
Highlighters come in wide-barrel, large-ink designs intended for longer use and in slim, pocket-sized models that clip to clothing or fit easily into pockets and backpacks.
Product descriptions commonly state highlighters resist smearing over many pen and marker inks but advise allowing the underlying ink to dry before highlighting to avoid smears.