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20ct Ruby (Oval, 20.54×13.69mm, Red) vs 3ct Sapphire (Oval, 10.91×7.27mm, Blue)


Quick summary: When looked from above (face-up position), 20ct Ruby (20.54×13.69mm, oval cut) appears 3.6 times larger than 3ct Sapphire (10.91×7.27mm, oval cut). See below how they compare side-by-side on a ring and finger.

20ct Ruby (oval cut)
vs
 3ct Sapphire (oval cut)
red
 
blue
20.54×13.69 mm 10.91×7.27 mm
actual size
Actual size of 20ct Ruby (oval cut, 20.54×13.69mm, Red color)   Actual size of 3ct Sapphire (oval cut, 10.91×7.27mm, Blue color)
 
Actual size is set for screen
Ring: Skin tone:
Ring width: 3.0 mm
Left finger image
Ring on left finger
Red 20ct Ruby (oval cut, 20.54×13.69mm) on a left ring and finger
64 mm
Right finger image
Ring on a right finger
Blue 3ct Sapphire (oval cut, 10.91×7.27mm) 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
 82% vs 44%
Saved...
Ring diameter: 16.9 mm
USA UK Asia EU1 EU2
Actual sizes of 20ct Ruby Oval (20.54×13.69mm, Red) and 3ct Sapphire Oval (10.91×7.27mm, Blue) 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

Ruby and Sapphire have the same specific gravity so their face-up size depends on the weight, shape and 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.


20 Ct Ruby (Oval) 3 Ct Sapphire (Oval)
20.54×13.69 mm vs 10.91×7.27 mm
230.58 mm²   65.04 mm²
Face-up size outline for 20ct Ruby (20.54×13.69mm, oval cut)
Face-up size outline for 3ct Sapphire (10.91×7.27mm, oval cut)
20ct Ruby Oval (20.54×13.69mm)
3ct Sapphire Oval (10.91×7.27mm)
Difference: 255% (165.54 mm²)
20ct Ruby (Oval, 20.54×13.69mm) has approx. 255% more face-up area than 3ct Sapphire (Oval, 10.91×7.27mm). In other words, it's 3.55x larger.


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