Hi all,

I would like to enter one of my better pic I have shot recently to the "New to photography" competition this month.

I was carefully reading the rules but the following puzzles me technically and I don't know how to do it.

Photographs entered must be no larger than 1024 pixels on the longest side and a maximum file-size of 250KB. Entries must be in JPEG (.jpg, .jpeg) format.
The only software for photo editing I got is Canon's Digital Photo Professional and I am only just scratch the skin of it.

So I am hoping if anyone can kindly instruct me how to achieve the size limit for my pictures so I can enter this competition. I like to see how far I can get

Thanks in advance