need help or tips for upgrade

I have resently started wearing my plug and doing selfbondage again after a year. And i thought getting used to my plug was going to take time. However it seems after swcond day now i am able to wear it for atleast 24 hours without discomfort. So here is what i need help with. I want a new one but do not know what to go for. Any tips? The one o have is a classic small one about 10cm long and 3cm wide. I was wondering the new one should i just get a normal bigger sized or should i get like a big long dildo og a plug that vibrates or can be inflated? I wanna here what u guys have experienced or would liked to try out yourself. And keep in mind this new one will be used in selfbondage and public all day wear