Dear Riri, Thank you for your patience. The hat is now complete, so please take a look. If it's not what you imagined, or if the size isn't right, you can cancel. Sizes A and D are infinitely adjustable with Velcro, so please consider them as approximate measurements. 【Size】 A: From forehead to the back of the ear 7-11.6 cm B: ~40 cm (I made it a little longer) C: 4 cm ~ (6 cm if A is set to the smallest size) D: 20.7-27.5 cm E: 8.4 cm (I made it a little longer considering the weight, breed, and purpose of use, but I think you can adjust it with A) Hand wash & ironable (be careful with high heat on decorations) If you are satisfied, I will list it for 1399 yen. As a small token of appreciation, I've made a pair of star-shaped charms from the same fabric as the hat, which can be coordinated with your harness or clothes, and attached them with a tag. I hope you will accept them. Thank you. ------------------- ≪Memo≫ Reference Size ↓C changed to "4 cm ~ (6 cm if A is set to the smallest size)" A: From forehead to the back of the ear 7.5-11.5 cm B: ~39 cm C: 5 cm ~ (7 cm if A is set to the smallest size) D: 19.2-27.5 cm E: 8 cm ⚠ Please read before purchasing ・The material is stiff, so strong creases may not easily disappear. Please be careful when washing and storing. ・This is a handmade item, so 　please refrain from purchasing if you are looking for a perfect product. ・Measurements are approximate. ・The back is secured at the base of the ears. ・It does not completely block UV rays. ・The chin strap will be shipped detached from the hat. ・Please use the safety pins on the charms with consideration for your pet's safety. ※We are not responsible for any accidents that may occur while using this product or its accessories. Please use it within your sight and ensure safety. ※Please refrain from imitating the size adjustment mechanism. ※The creator and seller of this product have deepened their understanding of intellectual property rights by consulting and receiving guidance from experts such as patent attorneys.