250 Small Seashells Green Hermit Crab Growth Shells Aquarium Decorations HCSA29 By AG All Natural Seashells And Nautical Accents By AG - 250 Small Seashells Green Hermit Crab Growth Shells Aquarium Decorations HCSA29 Sea shells measure ~1/2 - 3/4" wide. Mouth openings measure ~1/2 of the shell size Excellent for beach crafts, nautical decor, fairy gardens, miniature gardens, beach wedding decor, vase fillers, etc. Nice homes also for pet hermit crabs and great as aquarium decor! All natural wood/floral/seashells will have imperfections and may have slight variations in size/color as they appear to in nature! Please check size to make sure they fit your purpose!