Rather than a Contact Sheet or Picture Package, best for emailing is usually to make individual 72 ppi images saved as JPEG 8 or thereabouts. I like 6-7 inches on the longest dimension but you may indeed prefer smaller. Send some to yourself to determine the size you like best.
Give your photos a professional finish with sharpening in Photoshop. Learn to enhance details, create contrast, and prepare your images for print, web, and social media.
Related Discussion Topics
Nice and short text about related topics in discussion sections