Colour Catalogue – Increase size of

Hi,

I have uploaded the colour catalogue on my website but the picture is coming up too small. Here is the link:

http://potpourri-london.co.uk/colour-catalogue/?preview=true&preview_id=889&preview_nonce=8ecca8f401

I have experimented with increasing the size of the picture by using the scaling function but then it becomes too fuzzy. Any help will be much appreciated.

Regards,

Sunny