You can now order
PR & BG shapes

Our assortments are according to GIA standard

We are diamond manufacturers specializing in straight size brilliant cut diamonds, ranging from 0.9mm (0.004Ct) up to 5.0mm (0.50Ct).
Whether you buy 2 diamonds or a 1000 diamonds, our diamonds are calibrated to perfection without raising your costs!

Diamonds by Size enables you to buy diamonds directly from the source at the lowest prices.

Black Diamonds
0.9mm - 5.2mm
for only $245 p/c

Purchasing from Diamonds by Size is easy, just pick the stones you need and we'll prepare them for you.
Diamonds by Size will then ship your melee diamonds to you. Orders over $2,000 are FREE of shipping charges.

At DiamondsbySize we take pride in our work and reputation.
We ensure all our customers receive a safe, accurate and reliable buying experience.

CONTACT US NOW FOR MORE DETAILS!