1. As mentioned, you need a pointer hover for the buttons. Otherwise I had to guess they were buttons. . 2. 'Size not found, please try again' This not found

1. As mentioned, you need a pointer hover for the buttons. Otherwise I had to guess they were buttons. . 2. 'Size not found, please try again' This not found message is small and displays in the wrong place. When you click the calculate/search button, your gaze is down at the bottom, and the error appears at the top of the page, out of sight. Perhaps animate the color of the button, during search going purple say, then when the result is in ( none: red, some: green ) . 3. Please number the search parameters. You need all 3 to have values. Make them bigger too, they get lost. . 4. 'We compare so you don't have to'... I'd put that as 'Save time comparing tyre prices with our simple wizard' . 5. Include a working example with some actual results as a link. Chose a common car. Ford Fiesta 2009 165 x 30 x 13 ==> 40 comparisons