Brake pads shape

[tudorv]

Hi all!

I'm in need of a brake pad change, so I went to a local parts store and they said I need a type which differs in shape compared to the ones I have right now. I'm confused. Even searching on Google shows me different shaped pads. I seriously doubt any of the other shapes would fit properly in my caliper.
Here's an example of the two shapes that got me confused: the first ones were offered by the shop, the second ones are on my bike.

Can anyone shed some light on this?

Thanks!

T.