The shapes are based on Dutch roof lines, anyone who has been to the Netherlands, Amsterdam in particular, will have seen the amazing shapes.
The shape is a Window Shape (see thru)
The different blocks from this series work well together even though they are of different heights.
The sizes are based on 10cm x 2.5cm, fitting with our Bitcoins.
Please note: small marks on the gems are considered normal, it doesn't happen that much but occasionally there may be some small specks or a small mark. Please consider this a sign of the hand work involved in making these blocks, it does not detract form the play value.