What size of portrait would you recommend for my breed of dog (cat,people)?

What size of portrait would you recommend for my breed of dog (cat,people)?

Can you work to a specific size other than the ones listed? What is the largest possible size?

The answer to this question depends on whether or not you would like a head and shoulders,

a full body portrait, or whether you require a group portrait.

Head and shoulders portraits

Generally any breed of dog (cat) will work on a 11" by 14" for watercolor or oil (canvas)16"x20"

Can you work to a specific size other than the ones listed? What is the largest possible size?

Head and shoulders portraits