The fillable design has 2 or 3 layers.  The back is 3mm and the front section/s are 18mm and you can choose to have one or two of these. The frame is approx 8-12mm (depending on the size chosen). 

You can choose to have them so that they freestand (meaning some numbers will need to be altered to have flat bottoms, however, 30cm DO NOT freestand well and will easily topple...we suggest a max of 25cm for freestanding, but have added all options incase you require 30cm freestanding for an alternative reason) or you can have them 'flat' which means they will come as the font is designed, and therefore some letters like O and S will not freestand,

There is NO acrylic with this design so it will not allow for anything to be dropped in like a box.  Instead, this item has been designed for gluing in flowers or pom poms, and even chocolates if wrapped and held in place with something like cellophane, but other materials can be used. 

All of these mdf sections are cut from high density mdf leaving a clean finish with very little work required on the 18mm due to it's high quality.

The 3mm is laser cut leaving the blackened edges, but the 18mm is mitre cut so it does not have the darkened edge.

All sections arrive seperate from each other leaving you to easily decorate each section.  You simply need to then glue them together.