I found these adorable little Easter Bunny appliques at Bev’s County Cottage. They are crochet and can be attached to baby and children hats. The crochet bunnies are here: http://www.bevscountrycottage.com/bunny2.html.
The ‘Bunny Hats’ she has can be found here: http://www.bevscountrycottage.com/bunnyhat.html the hats are knitted.
There is a free Easter Bunny Crochet pattern at Fave Crafts (after you get done with their pop up) using sc (single crochet). It just says Baby but doesn’t give a size. Given the fact they are using a 5mm hook and 48 stitches I would say this pattern is for a 3-6 month baby. You can make this larger simply by continuing with the pattern of 6 increases per round until your circle (actually it will look like an octagan) is 1/3 the width you want your hat to be and then pick up again on round 9. Of course if you are making it larger it stands to reason you would probably want to make it longer so you would just keep hooking til your desired length.
I positively adore how they have done the ears in rounds!!
Below is a video that walks you thru crocheting an Easter Bunny Hat in various sizes using hdc (half double crochet)
This hat and the one at Fave Crafts linked above do not have earflaps. Remember the are very quick and easy to add on as shown here where we attached ear covers to a double crochet hat.