Blocks along with straps are absolutely required for progressing your yoga practice at all levels.  They can help stabilise and add height in standing and balancing poses or can be placed between the knees to activate the inner leg muscles.  Make sure you get yourself two!
 
Made from high grade, non toxic foam
Stylish design with rounded edges and corners for additional comfort and an easier hand grip
Extra durable and scratch resistant
Light enough to carry between classes, yet sturdy enough to bear your weight in postures
Available in many colours to match or contrast with your yoga mat
 
22cm length, 11cm width, 7cm depth