Someone knows the size limit of TAP files , TZX on emulators and real spectrum for saving blocks ?

Hi

Someone knows the size limit of TAP files , TZX on emulators and real spectrum for saving blocks ?

The limit is the number of blocks or size of the blocks??¿?

How many sentences SAVE can we do?

Is different size if we choose 48K, 128K, .... on the emulator?

for example

ZXSPIN -> Size Limit XX Kb or max XX Blocks inside TAP file or XX Blocks inside TZX file
BASINC -> Size Limit XX Kb or max XX Blocks inside TAP file or XX Blocks inside TZX file
REAL SPECTRUM ........
Etc .....

What is the emulator that can have the bigger TAP or TZX in size or number off blocks?

What's the bigger TAP or TZX you have made?

Thanks in advance