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SGC 8: centering requirements

From an August 2026 cross-check of SGC’s official scale. Checked 2026-08-22. Official page.

8 NM-MT: 65/35 front
Measure your card against this line →

Either side of it

SGC, every grade

GradeFrontBack
10 Pristine50/50
10 Gem55/45
9.5 Mint+
9 Mint60/40
8.5 NM-MT+65/35
8 NM-MT65/35
7.5 NM+70/30
7 NM70/30
6 EX-MT75/25
5 EX80/20
4 VG-EX85/15
3 VG90/10
2 Good90/10
1.5 Fair90/10
1 Poor

Questions

What centering does SGC require for a 8?

8 NM-MT: 65/35 front.

How much better does centering have to be for a SGC 8.5?

8.5 NM-MT+ needs 65/35 front, against 65/35 for 8 NM-MT.

How is the ratio measured?

Compare the two borders on each axis: a card whose left border is 57% of left plus right is 57/43. Services judge the worse axis, front and back separately. SlabbyPrep measures both from a photo to a hundredth of a millimetre.

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