Yamata Navy Stomach 11-12 years old. This Yamata stamp has been carefully designed since 1999 as an original product by Hashimoya ◆If you are not satisfied with this product, return and exchange is always OK. Fabric (Toray) thread count (No. 20/No. 16), 190 knitting threads; Unique color and deep navy blue, texture... Excellent Made using top sewing factory in Qingtao. Pattern Paper: We have tried and tested by dozens of people using the most well-made patterns.