As a photographer without a website (at the moment for certain reasons) i have been asked to show work( portfolio) to a potential client in Europe to do work in Asia.
With an art director acting as a middle-man i have been asked to show my work in ‘standard digital format’  as the prefered option of the client with the assumption that it will be done via e-mail.

1) Is there a ‘standard digital format’ to adhere to when sending work internationally or in Europe?

2) If not, considering i should send round 20 images is there a clean, acceptable and professional way of doing this i.e. PDF?, 20 separate pictures at screen res? or should i look for an online gallery for my work.?

My apologies if this seems like a silly question but it is the ‘standard digital format’ request has got me stumped. I’m hoping that someone could advise me or tell how they like to see their online submissions.

Thanks!