Sharpie Magnum Permanent Markers — Oversized Chisel Tip Black, 12-Count | Extra-Wide 3/4" Lines, Long-Lasting Ink

These Sharpie Magnum markers are extra-large permanent markers with a durable chisel tip that produces bold, highly visible black strokes for posters, signs, and tough surfaces.

When you need marks that read from a distance and survive handling, the Sharpie Magnum oversize marker delivers. Each 12-count pack contains heavy-duty markers with a wide felt chisel tip and a high-capacity ink reservoir formulated to write on porous and non-porous materials. Built to last and made in the USA, this marker set is aimed at projects where scale and durability matter more than fine detail.

How wide and bold are the marks from the Magnum chisel tip?

The Magnum chisel tip is engineered to create very broad lines for maximum visibility. Use the broad edge for thick strokes or the angled edge for slightly narrower lines, making it versatile for large-format work.

• 3/4-inch felt chisel tip produces extra-wide, consistent lines
• Works well for lettering on poster boards and corrugated signs
• Alternate tip angles let you vary stroke width quickly

Which surfaces will these permanent markers write on reliably?

Sharpie Magnum markers are formulated to adhere to a wide range of materials, both absorbent and non-absorbent. The ink holds up on common project surfaces, giving you dependable coverage whether you’re crafting, labeling, or marking outdoors.

• Effective on corrugate, cardboard, poster board, and paper
• Also writes on wood, metal, foil, plastic, leather, and stone
• Quick-drying formulation reduces smudging on many surfaces

How durable is the marker during heavy use?

The Magnum’s wide barrel houses a larger ink supply to extend useful life, so you can make many wide strokes without rapid fading. The robust felt tip is designed to resist fraying under repeated pressure, making these markers suited for continuous, high-visibility work.

• Large ink reservoir means fewer replacements during big projects
• Sturdy felt tip resists breakdown from heavy-handed use
• Permanent ink maintains boldness through handling and transport

Are these markers safe for classroom and office projects?

Sharpie Magnum markers are a practical choice for teachers, office managers, and event planners who need bold signage and durable labels. While they are permanent and not designed for skin use or fabrics intended for washing, they perform well for most common classroom and workplace applications.

• Ideal for poster boards, bulletin displays, and directional signs
• Made in the USA, meeting common quality expectations
• 12-count black pack simplifies bulk projects and shared spaces

Who this is for: Creators who regularly produce large-format visuals—teachers making classroom displays, event organizers preparing signage, warehouse staff labeling shipments, and artists or crafters working on bold, durable pieces—will appreciate the Magnum’s extra-wide strokes and long-lasting ink supply. Choose this 12-pack when readability at a distance and reliable performance across materials are your top priorities.