Choosing a Tube Size

Measure the Product’s Dimensions

• Length: The tube should be long enough to fully contain the product. If the product needs to be inserted and removed frequently, you might want to consider a tube that provides extra length for easy access.
• Diameter or Width: Measure the maximum width or diameter of the product. The tube’s internal diameter (ID) should be slightly larger than the widest part of the product to ensure it fits comfortably inside the tube without being too snug or leaving too much extra space. A good rule of thumb is to allow a slight gap (about 1/16”) around the product for easy insertion and removal.
• Shape and Flexibility: If the product is not a simple cylindrical shape (e.g., it has protrusions or is irregular), make sure the tube can accommodate these variations. The tube may need to have a larger diameter or a specific shape to fit.

Consider the Product’s Material and Weight

• If the product is heavy or delicate, choose a wall thickness strong enough to support the weight without collapsing or damaging the product.
• For example, rigid plastic tubes are ideal for heavier items, while flexible plastic tubes are better for lighter or more fragile items.

Consider Usage or Handling Requirements

• Ease of Insertion/Removal: If the product needs to be inserted and removed frequently, the tube should have a diameter that makes this easy. A tighter tube may make the process more difficult, while a larger tube could cause the product to move around too much inside.
• Seal or Closure: If the tube needs to be sealed (e.g., for packaging or shipping), ensure that the chosen size allows for proper sealing without damaging the product.

Consider the Intended Storage or Display

• Storage: If the tube is intended for storage purposes, you may need to ensure it is stackable or has features like a sealing cap for preservation.
• Display: If the tube is meant for retail display, the size should be suitable for showcasing the product attractively without wasting space.

Choose the Right Closure or Cap

• Once you’ve selected the tube size, consider the type of closure or cap needed to keep the product secure.
• Make sure the closure is compatible with the tube’s diameter and material. Options include screw caps, slip-on caps, or plug caps.

Test Fit

• If possible, order a sample tube in the size you believe will work best and test the fit with your product. This can save you time and money in the long run by ensuring the product fits properly and is easy to handle.