The thickest is 13.5” around. She hasn’t fully taken that one. She has another non black one that is 12.5” around that she can take pretty well but that extra 1” is too much currently and we honestly haven’t been trying to use that bigger one that much even though we both want her to take it. From left to right the girths are 6.25”, 10”, 9”, 9.75”, 8.75” 13.5”
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Here is her taking the 12.5” one
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Here favorites are the the 9” thick one, the 9.75” thick one and another not pictured that is 11.25” thick. And for guys thinking that obviously no one is that big, she also really likes the one that is 6.25” thick, it has the most realistic feel to it. She actually doesn’t like the 8.75” one that much because the material is a little rougher.