Gmail has a storage capacity of 15 gigabytes. All users can receive emails up to 50 megabytes in size, including attachments, but can send emails up to 25 megabytes. In order to send larger files, users can insert files from Google Drive into the message. If any user is having problem while sending mail, then he/she may contact the customer service on the toll-free number provided in Gmail Support Number to get quick response and get all issues resolved.