I got the Medium ones. I purchased 2 for 2 Springer Spaniels. Anything with a squeek is usually destroyed in seconds. I have had these before and they take a right hammering. They are my two dogs favourite indoor toya and they are chewed and chased all the time. They had these on Christmas day and they are still intack and squeeking. Amazingly strong and durable. I will be ordering 2 more for next years stocking. The strength of these make them excellent value for money.