The following sizes (for online adverts) are required: 

Leaderboards/Mid-section banners:

728x90 pixels (desktop/tablet)

320x50 pixels (mobile)

Resolution: 72 dpi

Rectangular/Inline banners:

300x250 pixels

Video/Pre-roll:

30MB

Skins:

Backround image: 

Notes for designers 
** you have to open a canvas with the total area of 2531 X 1264 px 
** your design, on both sides, needs to fit within 675 X 1264 px 
** leaderboard must be designed separately and can either be 728 x 90 or 728 x 250 
** all the dimensions are on the wireframe

Check out why you should advertise with MaltaToday here!