×
carat vs. color  length*  width*
  ×

(or examine a )
* size in mm (optional)

25ct Ruby (Round, 17.48×17.48mm, Red) vs 8ct Ruby (Round, 11.96×11.96mm, Red)


Quick summary: When looked from above (face-up position), 25ct Ruby (17.48×17.48mm, round cut) appears 2.1 times larger than 8ct Ruby (11.96×11.96mm, round cut). See below how they compare side-by-side on a ring and finger.

25ct Ruby (round cut)
vs
 8ct Ruby (round cut)
red
 
red
17.48×17.48 mm 11.96×11.96 mm
actual size
Actual size of 25ct Ruby (round cut, 17.48×17.48mm, Red color)   Actual size of 8ct Ruby (round cut, 11.96×11.96mm, Red color)
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Red 25ct Ruby (round cut, 17.48×17.48mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Red 8ct Ruby (round cut, 11.96×11.96mm) on a right ring and finger
Your settings
Ring
 Gold
Skin tone
 Light
Ring diameter
 16.9 mm
Ring width
 3.0 mm
Finger length
 64 mm
Finger coverage
 104% vs 71%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 25ct Ruby Round (17.48×17.48mm, Red) and 8ct Ruby Round (11.96×11.96mm, Red) as they would appear on a ring and finger. Adjust the ring and finger size to get an idea of how these gemstones would look on your finger.

Where to buy?

For certified gemstones, high-end gemstone jewelry, and birthstone jewelry, see Blue Nile

Face-up Size

The face-up size depends on the shape of the gem, its weight and the proportions of the cut. Face-up area is a measure of the size of the gem when viewed from above (as set in a ring). It tells you how big the gem is at the girdle plane.


25 Ct Ruby (Round) 8 Ct Ruby (Round)
17.48×17.48 mm vs 11.96×11.96 mm
239.98 mm²   112.34 mm²
Face-up size outline for 25ct Ruby (17.48×17.48mm, round cut)
Face-up size outline for 8ct Ruby (11.96×11.96mm, round cut)
25ct Ruby Round (17.48×17.48mm)
8ct Ruby Round (11.96×11.96mm)
Difference: 114% (127.64 mm²)
25ct Ruby (Round, 17.48×17.48mm) has approx. 114% more face-up area than 8ct Ruby (Round, 11.96×11.96mm). In other words, it's 2.14x larger.


Popular comparisons: