These are cut from 18mm mdf and come in two sizes. 

Either...

20cm, 18cm, 16cm and 14cm (smaller set)

or...

25cm, 22cm, 19cm and 16cm (larger set)

All blocks are 4cm tall, but you can now also choose to have each block seperate or the whole set as one (with or without engraved line too).

WE HAVE ADDED A TRADE DISCOUNT LISTING FOR A MINIMUM ORDER OF 100 HERE