Before you send that attachment via email, please consider these points:
There are far more reliable ways to send files than using email: Microsoft OneDrive, Google Drive, Dropbox, Box.com, Copy.com, Cubby, iCloud and many more. If you want to share without signing up for an account, you can use sites like emailattachment.net, WeTransfer, Send Anywhere, getalink.com or many others.
You take a risk that your email will be marked as spam and missed by the recipient. Anti-spam tools may mark your attachments as spam causing it to be moved to a spam folder out of view of normal users. If your recipient is not well verses in email procedures, they may not be able to find your file. Not everyone knows the ins and outs of their email client.
File attachments cause extra load on email servers. Not only does it take longer to send the email because of the size, but it gets scanned by multiple anti-virus and anti-spam programs along it’s route. Depending on the number of email users, the number of attachments sent by everyone and the number of attachments coming into the servers, that delay can be minutes or even several hours, depending on the loads.
There is no official standard among ISPs and Email Service Providers in general as to the allowed size of email attachments. While your company may allow a 50 MB file to be transferred in email, others may not. You may not be aware, without research, who you can send that larger file to or which email attachment you need to split into separate emails.
You take a chance that you will need to resent the email or find another way to deliver the attachment to the recipient which causes more work for you and for the person on the other end.