We offer 300 Pieces (15"x10.2" Inch), 500 Pieces (20.4"x15" Inch), 1000 Pieces (29.5"x19.7" Inch) puzzle sets, the difficulty level is up to you. Material: Our puzzles for adults are 1.8mm thick, bend-resistant,and sturdy enough that you can move entire sections of the adult puzzles by simply tugging at a single piece. Our jigsaw puzzles for adults are made to last. Beneficial activity: Working on jigsaw puzzles and focusing on the same image for longer periods can actually turn out more like meditations and induce a certain calmness and peace in the mind. And solving jigsaw puzzle plays a very important role in improving brain functions and sharpening your memory. Relieve stress: Take your mind off stress and anxieties. Research shows that creative activities like doing puzzles help reduce stress. Perfect for beginners: Feel too hard to finish the work? Dont worry, just check the solution in the backside area. It has been divided into several parts with letters marked as "a" "b", ourjigsaw puzzles also comes with an high-definition poster that will aid you while you work on the puzzle, which is easier for beginners. Perfect gift idea: Puzzle is one of the magical games that never go out of style, promotes hand-eye coordination intellectual game for adults and kids jigsaw puzzle - can give you more opportunities to communicate with and enchance the relationship to your kids it can exercise logical ability sensory coordination ability judgment and patience. Complete the puzzle and restore the beautiful pictures it is a game to expand your brain capacity strengthen eye-hand imagination coordination. This is good choice for birthday and christmas etc gifts.