The 2? size is actually about 1.25?. It is meant to match the 2? bubble guppies? heads. The 4? size is actually about 2.5?. It is meant to match the 4? bubbly guppies? heads. Our cookie cutters are primarily made to cut fondant. Certain cookie cutters can also be used to cut cookie dough, fruit, sandwich bread, chocolate or placed on strawberries, cake pops, sandwich cookies, cakes, cupcakes, rice crispy treats, apples, marshmallows etc. All cookie cutters are made with a quality 3D printer at the time of order. They are made out of PLA plastic which is biodegradable and good for the environment. The sizes listed pertain to the approximate height of the main cookie cutter in this set. This set contains 4 pieces. The 2 inch size is displayed. This cookie cutter has a depth of 1/2 an inch. All other sizes are directly proportionate to this size. Most cookie cutters will be red, however color may vary. These items are NOT dishwasher safe. HAND WASH ONLY WITH COLD WATER. Prolonged exposure to moisture and direct heat/sunlight should be avoided. For orders under and equal to 30 items please allow 48 hours for processing. For orders over 30 items contact us for approximate processing time. All United States orders will be shipped via the USPS (United States Postal Service). All international orders will be shipped via the USPS or UPS. Since the US post office does NOT guarantee their ship times, neither can we. Purchasing does NOT guarantee it will get to you in time and it does NOT come with a money-back guarantee.