Product details, measurements and ideas... Quality plastic letters 260 lower case, beautifully rounded and hugely tactile in a mixture of 10 bright colours: Pink, Purple, Red, Black, Jade, Green, Yellow, Blue, Orange and White. We feel they are a good size for our 4yr old daughter but the holes could do with being a millimetre or two larger. Height varies between approx: j 30 mm to c 18 mm. Width varies between approx: w 29 mm to i 4 mm. The letter thickness is approx 4 mm. Hole Diameter approx 2 mm. Quality 65 cm long laces X 3 each Orange, Green, Yellow, Blue and Red. They are a thick round woven design making a snug fit when pulled through the holes. It's good the laces aren't too thin so the letters remain spaced out if you want them to be, for ease of reading. Pushing the 3 cm long plastic ends through the holes is a bit of a squeeze but manageable. They could do with being 1 cm longer as threading the 3.5 cm hole span W and M is impossible unaided; there is not enough of the plastic end sticking out to pinch and pull through. My little one enjoys threading ( apart from M 's and W 's! ) name, mummy, daddy etc choosing from a small set of letters with us. Making three letter words is hugely enjoyable, especially satisfying wearing completed words as a necklace! We also use this set to: help make simple sentences laying the letters on the floor/table without threading, letter and colour sorting/matching, lay a few letters in a line and call a letter out to be found, match objects to their letter sounds, match a letter to something in the room beginning with it's sound, set the alphabet in a line and sing the alphabet song, put a letter inside a bag for touch and feel letter naming or two/three for matching; great for really thinking about the shape. They make rather sweet letter cakes for toys, a super alphabet shop and amazing alphabet soup in the café. Also paper clips can be threaded through the holes for a letter fishing game, with a magnet on the end of one of the laces. Super used as cake decorations too! The clear plastic tub with a green lid is most useful, it should last some time keeping the contents safe when not in use. A superb buy and multi functional learning aide offering many possibilities. There are Upper Case Letters and Number versions too!