All Sets
From OP-01 Romance Dawn through to the latest sets — every One Piece TCG card graded under our ultra-strict scale.
Secret Rares
Our microscope analysis is ideal for detecting the subtle surface wear and print defects that separate a 9 from a 10 on high-value Secret Rares.
Japanese & English
We grade both Japanese and English One Piece TCG cards with the same standard and precision.
Investment Protection
Graded One Piece cards hold their value and trade more easily. An HGG certificate gives buyers confidence.
Why grade your One Piece TCG cards?
A professionally graded card in an official HGG slab carries significantly more value on the secondary market. Buyers trust independently verified grades — and with HGG's ultra-strict standards, a high grade means even more.
Our high-tech digital microscope equipment examines every corner, edge and surface of your One Piece TCG cards with extreme precision. Every grade is earned, documented, and verifiable online.
Ready to grade your One Piece TCG cards?
From £15 per card · Turnarounds from 3 business days
Submit Your Cards → View Our Scale