The chin strap is the tie-up type. The brim has a wire in it, so you can change its shape. It has an adjuster for size adjustment. The size is unknown, but a child used it when they were 1.5 to 2 years old. One of the strings is slightly yellowed. It has been washed several times. There may be some overlooked stains. It will be folded and shipped in a simple package.