I guess it depends on what she considers pretty really.
Dog collars aren't such a great idea:
Why Buying a Bondage Collar at the Pet Store is a Bad Idea
You may be surprised by the price tags on some of the http://www.lovehoney.co.uk/sex-toys/bondage-bdsm/collars-and-leads/ you find online but these have been designed to be worn by humans, with your comfort and safety in mind.
A dog has a thick layer of protective fur around its neck and, as such, most animal collars are finished quite poorly on the inside lining. Not only would this be uncomfortable to delicate human skin but it could potentially cause lesions and grazes from constant rubbing.
Similarly, animal collars tend to be quite slim in width, allowing it to sit comfortably on the necks of both big and small dogs. However, all humans have a very similar neck size and the traditional fetish collars are designed to sit in a way that allows you to breathe comfortably and doesn’t stop you from swallowing. You can’t guarantee the same shaping and safety with an animal collar!
One final point comes in regards to sizing. Animal collars are designed to be tight so your precious pet cannot escape from it when it’s time for walkies. Human collars are designed to be tight but not too tight and, therefore, are only adjustable between certain sizes. You are much more likely to get the sizing wrong on an animal collar so it’s really not worth the risk.
However, there are some lovely collars around.
Here are some Lovehoney ones incase you missed them:
http://www.lovehoney.co.uk/product.cfm?p=15811 - Comes in pink, purple, red and black.
http://www.lovehoney.co.uk/product.cfm?p=17095 - A thick pink leather collar.
I found some other collars on different sites:
http://www.leatheretc.com/Merchant2/merchant.mvc?Screen=PROD&Store_Code=LE&Product_Code=3994PnkBrcd-Collar&Category_Code=Ring_Collars - $50 works out to around £30
http://www.leatheretc.com/Merchant2/merchant.mvc?Screen=CTGY&Store_Code=LE&Category_Code=fetish_bondage_toys - Some lovely pink collars and other bondage on this page.
http://www.leatheretc.com/Merchant2/merchant.mvc?Screen=PROD&Store_Code=LE&Product_Code=5499Collar-Rd_Pnk&Category_Code=Bondage_Collar this ones looks very pretty and unique.
http://www.leatheretc.com/Merchant2/merchant.mvc?Screen=PROD&Store_Code=LE&Product_Code=5547PnkBrcd_Bk-Collar&Category_Code= - Similar to the first one.
http://www.leatheretc.com/Merchant2/merchant.mvc?Screen=PROD&Store_Code=LE&Product_Code=5482ID_Collar&Category_Code= - Personalised collar.