10Pcs Bubble Spirit Levels Mini Circular Bullseye Bubble Level Small Round Spirit Level Measuring Layout Tools (10x6mm, Non-Adhesive)

Very small. Might need bigger if needed for visibility.

These are good, they are nicely uniform in size and indicate the level well. I use them in 3D printed components and they work well.

Purchased a pack of circular bubble levels from Amazon Haul for use on several turntables I have. The levels are just fine and will do the job. My 3 star rating is more a rating of myself not reading the item description. The levels are much , much smaller than I realized. Oh well, they will work and hardly cost anything...😉

Very small

Yes, these are small. They are perfect for adding them to a tripod that might not have a built-in level but has very little space for one, which is exactly why I got them. They have a nice recess on the bottom for adding a drop of E6000 glue or silicone adhesive to glue them down to something. They are not all going to be consistent or perfectly accurate. They are good enough for rough leveling a tripod (e.g. a small telescope on a small, manual alt-az mount, or a photographic tripod), but don't expect to use them for any critical leveling application.

I used these on some 3D printed tools for measuring at home and for similar industrial applications at work. They do exactly what you expect, and if well integrated in your design look pretty good as well.

These are great little bubble levels. My husband uses them for getting his scopes even.

Much, much, too small

I have never seen such small mini bubble levels and, they are fantastic for what I wanted them for. I have mounted them behind each of my drills to assist in achieving a straight hole.