OS X V10.7 Lion :: Attach Picture File To Emails?

I am stumped as to why I can't figure this out.  I have been trying to send an email to someone that needs a picture as an attachment.  Every time I click on the attachment icon or button in the menu, it puts the picture in the body of the email.  She needs to have it as an attachment that she can download onto her computer.  There has to be a way to do this, I am just not figuring it out.  Could someone please give me some insight?  I have tried saving to a file and attaching it from there, tried view image as an icon, but nothing seems to  be working.  She also needs it in a bigger file, which I think will be solved once I can attach the file without being in the body of the text.  How would I make a bigger file, from 131 KB to say 400 KB?