product option list color: As shown size: 6M(4-6M), 9M(7-9M), 12M(10-12M), 18M(13-18M), 24M(19-24M) The above content is only for reference! Don't buy in according to size, please use the size of the physical quantity standard, each customer for the right concept difference far away, we can't help you judge whether "appropriate" we can only give advice for your reference. color: As shown size: 6M(4-6M), 9M(7-9M), 12M(10-12M), 18M(13-18M), 24M(19-24M) Warranty & Maintenance: We offer the 1-month free replacement. Buyers may request for a replacement within 3 days from your receipt of the product. The buyer should return the product in the original conditions to us and should bear the shipping costs for return. We also provide 12-month free maintenance. The buyer should return the product in the original conditions to us and should bear the shipping costs for return. If any part is required to be replaced, the buyer should also pay for the costs of the parts to be replaced. Before returning the items, please confirm the return address and the logistics method with us. After you give the items to the logistic company, please send us the tracking number. As soon as we receive the items, we will repair or exchange them ASAP. Feedback: Your satisfaction and positive feedback is very important to us. Please leave positive feedback and 5 stars if you are satisfied with our items and services. If you have any problems with our items or services, please feel free to contact us first before you leave negative feedback. We will do our best to solve any problems and provide you with the best customer services.