How many times can you use one before disposal? thx

At least twice. If you are careful maybe 4-5 times. Handles are a bit narrow but I'm a big guy and it's not a problem. The different lengths of the brushes is a novel idea.

Can you choose a size? Or is there only packs of various sizes?

The two boxes I purchased had all one size inside. I use them as between teeth flossers. I do not have braces. My dentist totally approved of them

Do they come individually wrapped in just a box loose? I want the wrapped to keep in a backpack until needed

Not Individually wrapped up. They All are in a plastic box together. Also they're not very good Quality as far as I'm concerned, but just okay. I bought them for the price. But better than some of the other brands. I've had the brush part of them fall out or they turn while you're using them. Good luck

Units	100 Count
Brand	Patelai
Age Range Description	Kid

100 Count Braces Brush for Cleaner Interdental Brush Toothpick Dental Tooth Flossing Head Oral Dental Hygiene Flosser Toothpick Cleaners Tooth Cleaning Tool (Bright Colors,Multiple Sizes)

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