Spin pins

I just ordered a bunch of Spin Pins off Amazon, in the hopes that they would "change my life." I often think some item, some thing--typically a clothing item, or accessory or the like-- will change my life. And it never does.

Anyway, I ordered from a seller where you couldn't specify which color you wanted, but it worked out, because all of the ones I got were for dark hair. But they don't seem to work for me. My hair is too slippery and it slips out. I haven't gotten desperate enough to look for YouTube "how-to" videos, but I'm getting there. How long does your hair have to be for these to work? I'm wondering whether my hair (it's only shoulder-length) is too short. So I've tucked them away, to be brought out again when my hair is longer.

From left to right: mini spin pins, normal spin pins, and their updo stick, which is presumably for chignon-type styles.