This report conducts a legal and policy effectiveness assessment for the combat of plastic pollution in Thailand. Four legal and policy tools have been chosen to assess their utility in Thailand. These are (i) Extended Producer Responsibility (EPR), including incentives on waste segregation at source; (ii) bans or limitations on single use plastics / plastic bags, including incentive-based measures; (iii) limitations on international imports of plastic scraps, including taxes; and (iv) coordination and sharing of information.