Note: I've posted this review to the pages of all products I compared (listed below):My friend was looking for a wired headset for her cell phone. She's about 5'6" and petite. I got the 5 ones listed below for her to try out. She tried all of them, and liked only the MX150s, i.e. these:Plantronics MX150 Flexible Boom Headset with 2.5 mm PlugWhen speaking with her in her truck, the headset was once on the seat next to her yet I couldn't tell -- the sound was realy good. She also found them to be comfortable.She didn't like these 4:Plantronics MX505 Windsmart Boom Headset (Tan)Plantronics MX250 EarBud 2.5mm HeadsetJabra C500 2.5mm Mono HeadsetJabra C250 EarWave Boom Headset for 2.5mm PlugsShe said that mostly they were just uncomfortable for her. YMMV. I just bought 3 pair of thePlantronics MX150sfor myself and as stocking stuffers.