If your looking for a heavy tablecloth weight, these cast iron birds may be the perfect choice.
These are antique white cast iron birds that will let you prevent slipping and unwanted movement whilst maintaining an attractive appearance. Many other versions have a cheap or plastic appearance and appear as though they may lack the size and weight to actually be effective in securing a tablecloth. However, these cast iron birds are 2" long, and will definitely be capable of standing up to gusty conditions during a picnic and could also be great for outdoor entertaining at home. Their pleasant appearance means you can also use them on dining tables without creating a tacky look.