I have this small Ikea floating shelf, that my dad installed a few months ago but it recently fell off the wall. It looked like the holes he drilled were too big, as the anchors fell off.

Here's a photo of the holes,

https://imgur.com/iJe9ZFe

Here's a photo of the back of the shelf

https://imgur.com/BnI3IRT

and it's supposed to be propped up by two small screws,

https://imgur.com/Oe8OA9A

Now I know next to nothing about DYI stuff like this... so I'm wondering, what type of anchors do I use (the wall appears to be drywall)? How do I figure out the size of the anchor and the size of the drill I should use?

Thanks.

https://www.ikea.com/ca/en/p/lack-wall-shelf-white-90282180/

I bought this one LACK wall shelf

It doesn’t come with screws on purpose I heard. My wall is a regular North American house wall for reference.

So what screws should I get? Thanks

Bit of a reach here.. I'm hoping to find out the hardware used for the version of the LACK wall shelf depicted in this blog post from 2015: https://www.younghouselove.com/lets-take-some-shelfies/

I can't find the old article number and that version of the piece is no longer on the website.

I have this shelf with the L bracket but I lost the hardware while moving and was hoping I could order it rather than buy new shelves. There isn't much too it, just a few metal clips and the screws to attach the shelf to the L bracket - but those screws are the lynch pin. It's trash without them. Any help is greatly appreciated!