<b>*Measuring Your Dog for a Perfect Fit*</b> <br><br> <b>1，How to choose the size？</b> <br><br> <br>Please measure the chest circumference and neck length，the chest circumference is the most important. chest circumference is the widest part of the chest.Please consider 0.5 inch error. <br>Please measure carefully before buying and email us if you have any questions about fit before you bid or make a purchase.<br> <br>2, Your baby usually wears size S doesn't mean all size S will fit him/her.<br> <br>3, If any of the measurements are 'between' two sizes, choose the larger size.<br> <b>* Washing instructions: </b><br> it is recommended that normal temperature water and washed by hand, don’t soak for a long time，Flat out to dry, don’t high iron.