When choosing a dog bed to buy on ebay or any other internet provider it is often difficult to know the right size to buy as you cannot see it with your eyes and touch and feel it to establish what size dog bed your pet requires. 

Below is a table which tries to help with this problem, we really hope it helps. 
Please visit our pet store Net Pet Shop were you'll find 1000's of products including dog beds just click the link Net Pet Shop

While it is always best to measure your pet, we have provided the following guidelines for helping you choose the correct sized bed

The table below is only a dog breed and weight guide use your best judgement using the following table.
Remember that the breed examples are based on the average sized dog of that breed, if your dog is very large or very small for his or her breed
you should adjust your size choice accordingly.

It is generally better to buy too big a bed than too small of one.

X Small about 20" x 12" (51cm x 30cm)              ---  Chihuahuas, Maltese, Pomeranians, Cats and pets weighing 1 - 4.5 kg
Small about 24" x 18" (61cm x 45cm)                 ---   Border Terriers, Fox Terriers, Pugs,  Shih Tzu and pets weighing 5 - 11 kg
Small / Medium about 26" x 21" (66cm x 53cm)  ---  Larger Border Terriers, Larger Pugs Larger Shih Tzu 5 - 13 kg
Medium about 30" x 20" (76cm x 51cm)             ---  Cairn Terriers, Dachshunds, Shetland Sheepdogs and pets weighing 12 - 18 kg
Large about 36" x 24" (91cm x 61cm)                 --- Beagles, Chinese Shar-Pei, Welsh Corgi and pets weighing 18 - 32 kg.
X Large about 42" x 26" (107cm x 66cm)            --- Boxers, Golden Retrievers, Standard Poodles and pets weighing 32 - 41 kg.
XX Large about 48" x 30" (122cm x 76cm)          --- Collies, Doberman Pinschers, German Shepherds and pets weighing 41 - 50 kg
XXX Large about 54" x 37" (137cm x 94cm)        --- Borzois, Great Danes, Mastiffs and pets weighing 50 - 57 kg.

Hope you find it useful

Net Pet Shop