They will be too tight when you wear them out boot-scootin' at night. Never buy boots at night after a long day on your feet. You will swim in them in the mornings. Instead, buy your boots at midday or in the midafternoon, when you feet are in an in-between stage. Boot toes come in many different cuts.
Some boots have very pointy toes, others have very boxy toes, others have very rounded toes.
If your toes are boxy, you probably won't be able to find a comfortable pair of boots with pointy toes. This is especially important for women as many boots have very pointy toes. Next, look at the depth of your foot from the arch to the top of your foot. For women, if your foot is very deep, you may have touble finding a boot which does not bind. A boy's or a small men's size may be your best bet.