I have two skin coloured bumps on inner thigh doesn't pain size is around 6-8 mm .. can it be std?

Possible: Two painless skin colored bumps could be genital warts but they also could be benign moles/nevi, skin tags, or be caused by a pox virus. You need an exam to know for sure. If they start growing or spreading you need to be seen whether they are sexually transmitted or not. Hope this helps. Be safe.

Doubtful: could be almost anything, but probably not an STD. I am assuming that by asking the question, you have been having unprotected sex. If unprotected sex, especially with multiple partners, is continued, it will only be a matter of time before contracting an STD. A word to the wise...