A flexible measuring element for use with plural blood pressure measuring cuffs is provided. The flexible measuring element includes a flexible body, an identification block distribution region, and an indicating part. The identification block distribution region is disposed on the flexible body. The identification block distribution region includes at least two different identification blocks matching corresponding identification signs of the plural blood pressure measuring cuffs. When the flexible body is wrapped around an animal limb by a user, the indicating part lies within a specified identification block of the at least two identification blocks for prompting the user to select a specified blood pressure measuring cuff corresponding to the specified identification block.
