There are two possibilities why the lenses seem too big or too small. 

Firstly, the lenses may have become inverted and are not sitting correctly on your eye. This can be resolved by flipping them inside-out and giving them a good wash before reapplying.

Another possibility is that the parameters of the Desio lenses are not suitable for your eyes and you require a different diameter and or base curve. 

Unfortunately, we cannot replace the lens or issue a refund if the parameters you have ordered are not suitable for your eyes (as per our returns policy).