Acoustic Saddle

Guitar question involving the saddle or bone?

So I broke my saddle/bone on my fender acoustic electric today. I went into go buy another one and they asked me what size....I haven't been playing that long, so of course, I had a retarded look on my face. What "size" should I get for my fender?

I've played for years and you can just tell them its a Fender acoustic and get a large one and sand it down if you like.
Or take it in with you,
DONT DEAL WITH THEM AGAIN>

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