Some of them have more short, curly hair. This is purely a choice made by the owners. A Shih Tzu should stand no more than 26.7 cm at the withers and with an ideal weight of 4.5 to 7.3 kg. Floppy ears are covered with long fur, and the heavily furred tail is carried curled over the back. Floppy ears are covered with long fur, and the heavily furred tail is carried curled over the back. The Shih Tzu was recognized by the American Kennel Club in 1969 in the Toy Group.In 1934, the Shih Tzu Club of England was founded and the breed was officially recognised by the Kennel Club (UK) on 7 May 1940.