These OXBALLS suckers are made of Liquid Platinum Silicone because it's the best material out there. They won’t crack and have the right amount of “pull." BUBBLES nipplesuckers are the right size and depth to pull nipples out to rubbery points, sucking the tips mostly. The cool thing about these is the feel. BUBBLES are rubbery and soft, not plastic. The Larger sized are great for those with larger nipples or piercings. 

Small:

• Height: 1.5" 
• Width: 1.15” 
• Length: 1.15” 
• Outside circumference: 3.5” 
• Outside diameter: 1.15” 
• Inside circumference: 1.6” 
• Inside diameter: .65” 
• Inside max depth: 1.25” 

Large:

• Height: 2.25" 
• Width: 1.75” 
• Length: 1.75” 
• Outside circumference: 5.5” 
• Outside diameter: 1.75” 
• Inside circumference: 3.15” 
• Inside diameter: 1” 
• Inside max depth: 1.9”