Back: Each piece has a letter prompt on the back which can be easily solved. Easy to assemble. Challenges and gifts: suitable for family leisure and entertainment. Jigsaw puzzles can effectively stimulate people's thinking train their thinking judgment and patience. It can also be the best gift for your friends and family. Manufacturered by Golden needle. Puzzle size: 1000 pieces of puzzle size 38 * 52 cm (15 * 21 inche). After-sales service: If you have any questions please contact us we will provide you with a satisfactory solution. Material: 1000 pieces of puzzle are made of high-quality plastic non-toxic and non-debris. With precise cutting technology all parts can fit perfectly.