Rubie's Baby's DC Comics Superhero Style Baby Superman Costume

My LO is 16.6 lbs and 25.5 " tall. Will the 0-6 month be too tight?p I don't see an option for 6-9 months?

will the 6-12months fit an exactly 1year old baby?

What is the difference between the regular red and blue and the multi color?

In the description you state size 6-12 months fits up to 22 inches however in the questions you mention your son was 26 1/2 inches when he wore it