Those look like Sony Fontopia earphones to me. I have them in black (MDR-EX71SLB) and they cost GBP 25.66 from Amazon UK. The sound quality is good, but I would not buy them again for three reasons:
1) The main chord is a few centimetres short of reaching my waist, so I have to use the supplied extension lead which makes the overall length too long and cumbersome, and adds extra weight, making the effect I mention in point 2 below even worse.
2) As with many earphones for portable players, the lead of the left earphone is much shorter than the lead of the right earphone, the idea being that the longer lead is draped around the back of the neck. However, with the Sony Fontopia earphones, the left lead is far too short and has the effect of pulling the earphone out of the left ear, especially when taking into account the extra lead weight I mentioned in point 1 above. When I read someone else's comment on Amazon about this effect I thought it was an exaggeration and went ahead and bought the Sony earphones. Well, I experience the same effect. I'll be buying Shure or Sennheiser earphones when my Sony earphones finally give up the ghost.
3) The very small hole in the earphone gets blocked with ear wax too easily.
In summary, I will be buying Sennheiser MX 500 or Sure E3 next time.