Gmail is a good web based email service from Google. We often tend to share email attached with lots of files. Ideally a web based email service does not support email attachment size of more than 10MB. However, Gmail now supports more than double this size.
Email attachment size supported by Gmail
Gmail now supports 25MB of total email attachment size on every email. However, it is only recommended to go beyond 10MB email attachment incase your email recepient is also using Gmail. For example, if you are sending email from Gmail with over 10 MB attachment to Yahoo email ID, it may not go through – Yahoo Mail will most likely reject receiving emails with large attachment size.
So, use Gmail to Gmail emailing if you want to send emails with large attachment files upto 25MB.