Wondering which postage type best suits your shipment? We’ll help you determine which services your shipment will qualify for based on its size and weight. As carriers often enforce strict weight limits, it’s important to measure your shipment correctly and select an appropriate postage type for your shipment. This can help you to:

  1. Prevent delays to your shipment
  2. Avoid underpaying for postage
  3. See all of the postage options available for your shipment

Notes on Shipment Dimensions

Declaring accurate weights and dimensions while creating your shipments gives you access to the best pricing for your shipment. The tables below outline the maximum weight and dimensions for each of our services, organized by destination. If your shipment exceeds the limit for a particular service, you will not be able to receive a postage rate for that service. We recommend following these guidelines for how to accurately measure your shipments for a smooth shipping experience.

Sometimes, the dimensions listed on the packaging reflects the inner dimensions versus the outer dimensions.  In order to purchase accurate postage you need to enter the packaging's outer dimensions. For some boxes, the difference between inner and outer dimensions can be up to half an inch which can impact the price of your postage. We recommend that you double-check your package to ensure the dimensions are accurate as this will avoid any potential postage adjustments. 


Additionally, it is not well known but the dimensions of your shipment can also cause issues with generating postage like when a shipment’s dimensional weight exceeds a service’s weight limit. To learn more about dimensional weight please, visit our helpful support article. 


US Shipments

Adding dimensions gives you access to the best pricing and may be required in order to receive a postage rate.

CarrierMaximum DimensionsMaximum Weight
USPSMay vary by service and package typeShipments must not exceed 70 lbs
Chit Chats U.S. EdgeL + (2* W + 2* H) < 108 in
Chit Chats U.S. Select
  • No one side longer than 21" or 53 cm 
  • No two sides greater than 17” or 43 cm
  • Tubes are not permitted
Shipments must not exceed 15 lbs

See here how to calculate the dimensional weight of your U.S. shipments.

International Shipments

Weight and dimensional limits vary by destination country and can change without notice. Please refer to the USPS International Mail Manual as a guideline for the requirements of each destination. Shipments must be less than the maximum dimensions and maximum weights listed in order to receive a postage rate for the service.

CarrierMaximum DimensionsMaximum WeightNotes
USPSMay vary by countryShipments must not exceed 70 lbsFirst Class International shipments limited to 4 lbs
Chit Chats International TrackedMay vary by country but typically:
(L + W + H) < 900 mm

Where:
L <= 27, W <= 15, H <=15 in
L <= 42.5, W <= 4, H <=4 in
Shipments must not exceed 30 kgShipments 1 oz (the starting rate) must be rounded up to 1 oz. Otherwise the rate may not be displayed.


Canadian Shipments

Very light shipments must be rounded up to 100 g as all shipments less than this amount are charged the same starting postage rate. 

CarrierMaximum DimensionsMaximum WeightNotes
Chit Chats Slim12 in x 9 in x 0.8 in
(30 cm x 22 cm x 20 mm)
Shipments must not exceed 10 oz

Minimum weight 10g

Minimum dimensions 4 in x 6 in x 0.2 in (10 cm x 15 cm x 5 mm)

Chit Chats SelectNo singular dimension greater than 40 inShipments must not exceed 65 lbsMinimum weight 0.1 lb
Chit Chats Canada TrackedMaximum dimensions, L, W, & H in cm
L < 2 m
L + (2 x H + 2 x W) < 3 m
Shipments must not exceed 30 kgShipments <100 g (the starting rate) must be rounded up to 100 g. Otherwise the rate may not be displayed.
Chit Chats Collect34 cm x 42 cm x 20 cm Shipments must not exceed 11 lbs

See here how to calculate the dimensional weight of your Canadian shipments.

*Service availability may vary. Irregular parcels should be measured as if they were enclosed in a rectangle. Surcharges may apply for oversized and irregular shipments.