I purchased these earphones for my blackberry pearl which requires a 2.5mm sized plug. This did NOT fit my blackberry. The product I received was 3.5mm. However, I still kept the earphones because they play beautifully on my computer. But now I have to order an adapter that can connect these earphones to my blackberry. So if you're buying this product for a Blackberry Pearl then these won't fit. But if you just want good earphones to go for your laptop or desktop then this is a very good product.