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Shipping Options


You can purchase several types of labels from Kidizen. It is important to make sure you are picking the correct shipping label option so that you (or your buyer) do not have to pay underpaid postage charges. Please note that your package must weigh under the weight stated on the shipping label size or will be subject to an underpaid postage charge, or it may be returned to the seller where the seller will need to pay for shipping again. For any label 5 Ibs or over, your package must weigh under the weight stated on the shipping label size. 

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You can weigh items by purchasing a scale on Amazon, similar to the one here

Orders can be sent in any packaging (polymailer bags, boxes, etc.) EXCEPT for any carrier-provided packaging (such as USPS Priority packaging) on our labels as this can cause confusion since it is going in between different shipping carriers.

  • Using carrier-branded packaging could result in an underpaid postage charge to your order (from an additional cost that the carrier passes on).

Maximum sizes

  • The maximum combined length and circumference of any parcel is 108” (this includes outer packaging).
    The circumference is width plus height multiplied by two, so combined length and circumference = L + 2x(W+H).


Priority Flat Rate Padded Envelope

  • Flat Rate Padded Envelope: $9.50. This can be ordered from USPS for free and can be used to ship bundles or smaller heavy items. This is a less expensive alternative to the 5-pound label if the item fits in the envelope. If it fits, it ships!



Media Mail

  • Coming soon in Spring 2024!
  • Media Mail is a cost-effective way to ship heavy education materials. Items that can be shipped using this option are books (8+ pages and cannot be comic books), CDs, DVDs, Blue-Rays, vinyls, tapes, and VHS, sheet music, and educational sheets. You cannot ship comic books, video games, or anything with advertisements (including magazines). 
  • Shipment time can be slightly longer than First Class and takes 2-8 days. 
  • Max girth is 108" (width x 2 + height x 2) and max weight is 70 pounds. 
  • All media mail packages are subject to inspection. If compliance is not adhered to, packages may be sent to the buyer with postage due, sent back to the seller with postage due, or they may contact the seller to pay postage. 
  • View all the details on USPS here


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