The only factual answer possible is this: one measurement of the diamond is 2.2 mm.
If the diamond is a round brilliant cut, it's possible that a diamond of this measurement weighs about .04 carats or 04/100ths of a carat.
If the measurement you give -- 055 -- is converted to .55 carat, and the diamond is a round brilliant cut diamond, the diameter of the diamond at the girdle is between 5.2 MM and 5.6 MM, being the MM measurements of .50 and .60, respectively.
A 2 mm round diamond weighs about .03 carats, so a 1.5 mm round diamond would be smaller than .03 carats. A .01 carat diamond is about as big as a grain of sand.
A 20 carat diamond weighs 20 carats. If the diamond is a round brilliant cut, it measures about 17.6 mm at the girdle.
The millimeter size of a diamond of this weight varies, depending on the cut. If the gem is round cut, its measurement at the girdle will be between 16.3 mm (15 carats) and 17.6 mm (20 carats).
Depending on the cut, a five carat diamond always weighs five carats. If the cut is round brilliant, the mm measurement at the girdle is about 11.
51.5625 mm
If the measurement you give -- 055 -- is converted to .55 carat, and the diamond is a round brilliant cut diamond, the diameter of the diamond at the girdle is between 5.2 MM and 5.6 MM, being the MM measurements of .50 and .60, respectively.
A 2 mm round diamond weighs about .03 carats, so a 1.5 mm round diamond would be smaller than .03 carats. A .01 carat diamond is about as big as a grain of sand.
From here: To here
The diamond weighs .125 carats. Its mm measurements depend on the cut.
22 x 15.5mm = 341mm 341mm = 34.1cm
A 20 carat diamond weighs 20 carats. If the diamond is a round brilliant cut, it measures about 17.6 mm at the girdle.
13 x 22 mm is equal to 286 mm2. To put it another way, the area of a rectangle with sides of 13 mm and 22 mm is equal to 286 mm2. This is the same as 0.286 cm2 or 0.0000286 m2.
Multiply the number of inches by 25.4.
1 inch = 25.4 mm Answer = (22 x 44)/(25.4 x 25.4) = 1.5 sq inches
2mm or 3 mm would be fine. The smaller the band, the bigger the diamond looks.
The millimeter size of a diamond of this weight varies, depending on the cut. If the gem is round cut, its measurement at the girdle will be between 16.3 mm (15 carats) and 17.6 mm (20 carats).