This is a common problem for many of our customers. Whenever we get a call, we are always happy to help with film sizing. This post is intended to help anyone who wants to figure out for themselves what size film they need.
One of the main things to remember when deciding on the size of your shrink film is that shrink film shrinks!
It’s true that the shrink film you put on your product will shrink to 40% of its original size. This means that a larger size is always better than a smaller size.
Measuring the perimeter of a shrink-wrapped object is common to all of these recommendations.
Perimeter is defined as the distance around a closed curve or around the object. Below are the common types of shrink wrap products we sell, and the recommended measurements.
Insert shrink wrap – The easiest way to measure an insert shrink wrap is to increase the height and width, then add 2-3 inches.
If a product is 10 inches wide and 4 inches high, you can add 10 + 4 + 2 = 16. 16 inches wide film is ideal for packaging products. If a 16-inch film is not available, use the next size up and do not use the next size down.
Shrink Wrap Tubes – To measure shrink wrap tubes, measure the circumference of the widest point of the object, then add 10-15% and divide by 2.
If an object has a circumference of 10, then the equation is: 10 x 10% = 1, then add 1 to the circumference 10 + 1 = 11 and divide by 2 11/2 = 5.5 in. A 6 in. wide shrink wrap tube would be ideal for this object.
If there is no available 6″ size, feel free to increase the width of the tube to the next size up.
Shrink Wrap Bags – The measurement of a shrink wrap bag is very similar to the measurement of a shrink wrap tube. Measure the circumference of the widest point of the object being wrapped.
Then measure the length of the wrapped product. Add 10-15% to the circumference of the width and divide by 2. If you have a product with a width circumference of 14 inches and a length of 20 inches, then the formula is
Find the width 14 x 10% = 1.4, then add 1.4 to the circumference 14 + 1.4 = 15.4 and divide by 2 15.4/2 = 7.7. A bag that is 8 inches wide.
The length is 20 inches. You will need an 8 x 20 inch bag to package the product. If that size bag is not available, you can choose to increase the size.
Remember, when measuring shrink-wrapped bags, always consider whether the product will be sticking out of the container being wrapped.
Often, products in gift bags and other packaged items will stick out of the basket or container, make sure you place them in the basket or container before measuring the length.
If the formulas and calculating numbers are too time consuming, feel free to use our shrink wrap calculator found on each product page.