According to the 3GPP standard, the maximum individual short message size is 1120bits. Under different coding schemes the maximum individual short message size may be different. Please see details below:

1. Using the GSM 7-bit alphabet the maximum size is 160 characters (1120bits/7 bit=160)
2. Using the GSM 8-bit alphabet the maximum size is 140 characters (1120bits/8 bit=140)
3. Using the UCS2 16-bit alphabet the maximum size is 70 characters (1120bits/16 bit=70)