Topshop Cream Mixed Stone Collar - £32
Also available in blue and red, I'm loving this for a dressing up over a plain white shirt after a hard days work ... now en route to drinks!
Accessorize Miriam Collar Necklace - £30
I know it's more of a necklace than an actual collar but I love it! Wear with a cream shirt buttoned all the way up.
Asos Smooth Triangular Collar Tips - £10
A greatway to spice up shirt collars.