These are actually quite detailed. Reviewers state that they're well made, with vivid detail. In your own back garden these should be fine to prevent corners flipping up and provide a bit of resistance against the wind. Perhaps in windier conditions at the beach you'll need something a little heavier, or a set of clips.
How much do they weigh?
Well, as far as I can see, the weight of each piece isn't mentioned on the Amazon product page. The only weight I can see is the shipping weight of 1lb. One reviewer says they're heavy, another says not as heavy as they'd like.
As you can see, these are quite well made. I'm actually getting hungry just looking at them.
These come in a 4 piece set.
They can be viewed on Amazon.
Another popular option is these ant weights.
The ants are made of resin and attached to metal clips. They're hand painted and come packaged in a gift box. Ants at a picnic are usually the last thing you want, but these are quite cute and are described as being a bit of a conversation piece, which kids also love. I think my dislike of ants makes these a little less appealing to me. I think my pets food bowls have been swarmed by ants a few too many times.
How much do they weigh?
Once again, for some reason, the product page does not list an actual weight, meaning you'll just have to order them and hope they'll do the job. You'd think that including the weight in the product description would be a pretty basic expectation. A coupe of people reviewed these as being plenty heavy enough, whilst others have said they need them to be heavier.
These are a pretty cool gift idea. These come in a pack of 4.
They can be viewed on Amazon
