A method of wireless communication performed by a first wireless communication device, the method comprising: determining a first set of transport block, TB, size determination parameters associated with a first TB repetition of a TB and a second set of TB size determination parameters associated with a second TB repetition of the TB, wherein: the first set of TB size determination parameters and the second set of TB size determination parameters include at least one of: different respective first and second modulation and coding schemes for the TB; different respective first and second numbers of resource elements, REs allocated for the TB; different respective first and second numbers of layers for transmitting the TB; or a combination thereof, wherein a first TB repetition size based on the first set of TB size determination parameters would be different to a second TB repetition size based on the second set of TB size determination parameters if determined independently; the method further comprising: receiving, from a second wireless communication device, a rule that indicates how the TB size for all TB repetitions is to be determined, wherein the rule is a common rule that is applied by both the first wireless communication device and the second wireless communication device, wherein application of the rule results in a same TB size to be used for all TB repetitions; calculating a first TB size using the first set of TB size determination parameters and a second TB size using the second set of TB size determination parameters; applying a function to the calculated first TB size and second TB size to determine the same TB size to be used for all TB repetitions, and wherein the function is the minimum TB size of the calculated TB sizes, the maximum TB size of the calculated TB sizes, or the average TB size of the TB sizes; and communicating, with the second wireless communication device, the first TB repetition and the second TB repetition using the same TB size. determining a first set of transport block, TB, size determination parameters associated with a first TB repetition of a TB and a second set of TB size determination parameters associated with a second TB repetition of the TB, wherein: the first set of TB size determination parameters and the second set of TB size determination parameters include at least one of: different respective first and second modulation and coding schemes for the TB; different respective first and second numbers of resource elements, REs allocated for the TB; different respective first and second numbers of layers for transmitting the TB; or different respective first and second modulation and coding schemes for the TB; different respective first and second numbers of resource elements, REs allocated for the TB; different respective first and second numbers of layers for transmitting the TB; or a combination thereof, wherein a first TB repetition size based on the first set of TB size determination parameters would be different to a second TB repetition size based on the second set of TB size determination parameters if determined independently; the method further comprising: receiving, from a second wireless communication device, a rule that indicates how the TB size for all TB repetitions is to be determined, wherein the rule is a common rule that is applied by both the first wireless communication device and the second wireless communication device, wherein application of the rule results in a same TB size to be used for all TB repetitions; calculating a first TB size using the first set of TB size determination parameters and a second TB size using the second set of TB size determination parameters; applying a function to the calculated first TB size and second TB size to determine the same TB size to be used for all TB repetitions, and wherein the function is the minimum TB size of the calculated TB sizes, the maximum TB size of the calculated TB sizes, or the average TB size of the TB sizes; and communicating, with the second wireless communication device, the first TB repetition and the second TB repetition using the same TB size. receiving, from a second wireless communication device, a rule that indicates how the TB size for all TB repetitions is to be determined, wherein the rule is a common rule that is applied by both the first wireless communication device and the second wireless communication device, wherein application of the rule results in a same TB size to be used for all TB repetitions; calculating a first TB size using the first set of TB size determination parameters and a second TB size using the second set of TB size determination parameters; applying a function to the calculated first TB size and second TB size to determine the same TB size to be used for all TB repetitions, and wherein the function is the minimum TB size of the calculated TB sizes, the maximum TB size of the calculated TB sizes, or the average TB size of the TB sizes; and communicating, with the second wireless communication device, the first TB repetition and the second TB repetition using the same TB size.