Help with image on a collections page

Hello

I want to add a picture to a collections page but it is popping up more little than I want.  I saved it as 950 by 290 pixels and tried showing it as size 'actual' but the picture is then huge!  What am I doing wrong?  i want it to be the same sze as the slideshow if possible!

Many thanks in advance (and happy new year too!)

kirsty