If you are not careful you will soon be glued to this crazy world of wall builders.  All, apart from Great Wall 1, are 'details' which can be found in the complete wall picture on the back of each card.  
The cards are delightfully executed, produced on quality card, with  white ribbed envelopes to accompany them.

Blank inside and individually cello-wrapped.
148mm (6”)square 
Postage and packing:  £1.75 / order