tm is a trademark, not an extra large size. According to the relevant information, TM does not refer to extra-large clothes, and the abbreviation of extra-large clothes is replaced by LM. TM is the abbreviation of TRADEMARK, which means business mark, and is called trademark for short. In China, the capital TM in the upper right corner of the commodity name indicates that the trademark is being accepted for registration and has not yet obtained a trademark certificate. The circle R in the upper right corner indicates that the trademark has been registered and obtained a trademark certificate.