Since 1877 Zweigart has been well known as the producer of the most high quality stitching fabrics, including the Aida used for TSK cross stitch designs. 
 
All TSK cross stitch bauble kits come with 18ct aida included, creating 3inch finished pictures and with the small stitches creating a less pixelated final picture. (18 count=18 stitches per inch) If you want to redo the baubles as they are, for example for Christmas cards, select the 18ct option. 
 
14ct aida on the other hand has larger stitches and is used for many of the free TSK patterns. (14 count - 14 stitches per inch) 
 
The size of each piece is sufficient to complete any 3inch diameter design leaving a 2 inch border to allow for fraying and framing.