CRST International does not publicly specify a minimum shipment size requirement on their website as this can depend on the nature of the service being utilized. Typically, logistics companies have varied policies based on factors such as the type of shipment, service level, and specific routes. It is common for companies to accommodate both small and large shipments, so it is advisable to check the particular service details relevant to your needs. For more precise information, including any potential minimums, one may wish to consult the specific service sections of the CRST website or further explore their various offerings. This way, you can find out what best aligns with your shipping requirements.