4mm Corner Rounder Punch – Paper, Photo & Card Cutter | Black

Give your photos, cards, labels, and paper crafts a clean, professional finish with the 4mm Radius Corner Rounder Punch. This compact, easy-to-use tool trims sharp corners into smooth, rounded edges in a single squeeze — no scissors or rulers needed. Perfect for scrapbooking, card making, laminating, and any paper craft project that deserves a polished look.

Why You'll Love It

• 4mm Radius Corners: Creates perfectly uniform, smooth rounded corners every time.
• Versatile Use: Works on photo paper, cardstock, business cards, labels, laminated sheets, bookmarks, stickers, and more.
• One-Squeeze Action: Sharp, hardened steel blade cuts cleanly through paper with minimal effort.
• Compact & Portable: Lightweight, handheld design fits easily in a drawer, craft bag, or desk organizer.
• Consistent Results: Built-in alignment guide ensures each corner is trimmed at the exact same radius for a uniform finish.
• Durable Construction: Sturdy black body built to withstand regular use in home, office, or classroom settings.

Great For

• Scrapbooking & journaling
• Photo albums & picture framing
• Handmade greeting cards & invitations
• Business cards & name tags
• DIY labels, tags & bookmarks
• Classroom & office projects

Specifications

• Corner Radius: 4mm
• Compatible Materials: Photo paper, cardstock, regular paper, laminated sheets
• Color: Black
• Made in: China

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For more tips on paper crafting techniques, visit the Smithsonian Institution, a trusted resource for arts, crafts, and creative education.

Learn more: Hole punch

Frequently Asked Questions

Q: What paper thickness can the 4mm corner rounder punch handle?

A: The corner rounder punch is designed to cut through standard paper, photo paper, cardstock, and light laminated sheets. It works best on materials up to approximately 3–4 sheets of standard paper at a time for clean, sharp results.

Q: Does the 4mm radius corner rounder punch work on laminated sheets?

A: Yes! The hardened steel blade is capable of trimming light laminated paper and photo paper, making it ideal for ID cards, bookmarks, and laminated labels.

Q: How do I keep the blade sharp and the punch cutting cleanly?

A: To maintain peak performance, punch through a piece of aluminum foil occasionally to help keep the blade sharp. Avoid cutting materials thicker than the punch is rated for, and store it with the cover on to protect the blade when not in use.