Hollow Number Flash card set with holes representing the numbers
 
The cards are approx 12cm x 8cm and are on 3mm MDF 
 
The holes are 12mm (Please note that they are smaller on the 11-20 set, approx 9mm) 
 
You can buy the pack of cards on their own, or with a stand for easy storage (The stand is 18mm on a separate 3mm base which can be glued on) 

Please use the drop down menus as the photos will show you what you get for your choices.