Is there a larger version? That's too small for me to make out.

Largest one I found (right-click to view full size)
https://images2.imgbox.com/4a/48/IqY9tDzC_o.png

ShiShiLeo uses it for their signature, and it's a great piece. It's the first 18 Heisei Riders and the female lead(s) from their shows. I think the Blade (Hirose lifting Blade!) and Fourze (Hayabusa!) ones are my favorites.

Shinnosuke: Guys look, I got married!

You couldn't have just directly asked the person whose signature you plucked the image from?

Anyway, here is the source: https://www.pixiv.net/en/artworks/61925710

My fav of that lot is Izumi lifting Eiji, because I’m predictable. Friend goals!

They're all good! Wizard, Ghost, and Blade are the best, but it's just a great drawing all round.

Just remembered, had a odd dream a while back where it was around morning and I was just eating cereal while supposedly just binge-watching what seemed like an anime adaptation of Kamen Rider Spirits. WHY CAN'T WE HAVE NICE THINGS. Only other detail I remembered was hearing a Steve Blum-ish voice from ZX. Or was it V3? Either one.

You can always click and drag a signature image to your browser's tab bar to see it in a larger size.

As far the source, this is the original artist: https://twitter.com/sora87186800

I would definitely enjoy an adaptation of KR Spirits. I know Shin is still ongoing, but it's original run finished, right?