wanted to send pics to family in italy on my trip there over the summer. want to send send the digital files of all the pics from my trip but i dont want to send master files so should i send the fit within 1024 or fit within 640 jpgs?

i dont want to send the files that are big because i dont like having something close to master files out there.

so fit within 640 or fit within 1024 jpgs or it doesnt really matter?

thanks for the help