White Diamond Cube 0.4 ct

  • Most of the jewellery is handmade to order. It takes 2-6 weeks from your purchase to ship. Meanwhile some of the items are ready in stock and shipped immediately. Please contact us to clarify availability and production time.
  • We deliver our goods with TNT courier service in 1-3 business days (after the order is ready).

The simplicity of shape never goes out of style. Stunning white diamond set into a golden cube. Finished with a little signature golden dot.

  • solid gold
  • diamond: 4.0 mm, princess cut (0.4 ct), white (comes with certificate)

How to measure my ring size?

The best way to measure your exact ring size is to head over to a local jewelry store/workshop and figure it out.

When to measure my finger?

Do not measure a finger when it is cold or too hot as this can have a significant effect on a ring size. For example, when your fingers are cold they can be at least half a size smaller.

How should the ring fit?

  • Your ring should fit comfortably, so that it is tight enough not to fall off, but loose enough to slide over your knuckles 
  • Remember that no two hands are exactly alike. A ring worn on one finger on your left hand won’t fit perfectly on the same finger on your right hand.

Is the size equal for all ring models?

The style of the ring also affects the size: for a thinner ring you should consider a smaller size than for a wider ring.

What if I'm buying a gift?

If you are buying the ring as a gift, please contact us and we will try to help to figure out the right size by requesting additional information from you like hand photos, body height, etc.

Can’t decide between two sizes?

If you can't decide between two sizes, we suggest you choose larger rather than smaller size.


 Inner diameter (mm) UK / Australia US / Canada
12 1/2 A
12.5 1 1/4 B 1/2
13 1 3/4 C 1/2


2 1/4 D 1/2


3 F


3 1/2 G


4 H 1/2


4 1/2 J


5 1/2 K 1/2


6 L 1/2


6 1/2 M 1/2


7 O


8 P 1/2


8 1/2 Q 1/2


9 R 1/2


9 1/2 S 1/2


10 U


11 V 1/2


11 1/2 W 1/2


12 X 1/2


12 1/2 Z 1/2

Some items are READY IN STOCK  and will be delivered in 1-3 working days, but some require production. Before making the purchase, please check the "Production time" section in each product's description. Or feel free to contact us and clarify the production time: orders@room88.eu


Delivery cost & time


 5 eur


TNT courier

Pick up in Studio


Elizabetes 41/43, Riga

Estonia & Lithuania  10 eur
TNT courier

EU 20 eur
TNT courier


USA 30 eur
TNT courier
+ any local taxes and duties
Australia 30 eur
TNT courier

+ any local taxes and duties

Rest of the world
30 eur
TNT courier
+ any local taxes and duties