[header] How to find a dog halloween costume online [title] Determine your dog's basic size. [step] Many manufacturers keep to standard sizes like small, medium, or large; occasionally branching out to x-small or x-large. So it's important to first establish which category your dog falls under. 
You want to take into account not only the size of your dog, but it's weight. [substeps] For example, you may have a little dog, but it might be quite round.