Memory Stick Pro - how to insert in memory

Have a dell Inspiron 1525 notebook with memory card reader, compatible with Memory Stick Pro - but i cannot figure out how to insert the memory stick into the memory card reader - an SD card slots in easily, but how do i to put the Sony stick in - it seems way too small for the slot?
Bit of a mystery to me i'm afraid - any advice appreciated, thanks!

 

Is it a Memory Stick Pro Duo?


If it's the same as the black memory card, then you will need a memory stick adapter pictured above for it to work in your dell.

If it's Memory stick Pro, which is the same length as the old blue memory stick. Just stick it in and it should work.

 

Thanks D3X - yes it is the Pro Duo. Once i saw the photo above, i remembered that i got the adaptor with my camera when i bought it - i had forgotten all about it! Many thanks for your quick response and the photo was really helpful.