Re-sizing book cover images

[G.G.]

Might I trouble you to help me re-size the cover image for one of my books? For whatever reason, when I uploaded the image it turned out smaller than other books and I haven't been able to figure out a way to re-size it to fit. Many thanks in advance for your help!
G. G. Rowley

[Deon]

fixed (i had to delete & upload again)
it had a white border
got the image from amazon

[G.G.]

Deon wrote: "fixed (i had to delete & upload again)
it had a white border
got the image from amazon"
Thank you so much! Really appreciate your help and technical expertise.