The Hookshot is more or less life-size and is modeled after the Ocarina of Time version. Amphigory Design says it’s phasing out the double-chained variant in favor of the single chain design because the latter is more comfortable and durable. The Bombchu on the other hand comes in 1.75″ or 3.5″. Both items are hand-painted, but the Hookshot is also available as a cheaper unassembled and unpainted kit.
Amphigory Design sells a fully assembled and painted Hookshot for $75 (USD), while the DIY kit goes for $45. The large Bombchu sells for $23 and the small one sells for $13.