•Save 10% on all online submissions — Code: GRADE10•Tamper-evident graded slabs•Live population registry•Trusted by collectors, dealers & auction houses•Save 10% on all online submissions — Code: GRADE10•Tamper-evident graded slabs•Live population registry•Trusted by collectors, dealers & auction houses
MAS
About MAS Grading

Your #1 trusted source for trading card grading

MAS Grading is the sister service to MAS Authentication — the leading, most trusted name in collectible certification. We deliver accurate, reliable, and thorough grading for collectors, investors, and enthusiasts.

12+
Years of Expertise
250K+
Items Certified
50K+
Certs Issued
99.9%
Verification Accuracy
Why choose MAS

Built on trust & precision

Integrity First

Every grade is assigned with uncompromising honesty and consistency — no shortcuts, no favors.

Expert Team

Certified specialists with years of experience across sports, TCG, and entertainment collectibles.

Global Reputation

Recognized and trusted by collectors, dealers, and auction houses worldwide.

Fast & Reliable

Efficient turnaround without ever compromising accuracy or care for your cards.

Ready to certify your collection?