Shipping and Delivery

Delivery Time

Delivery Time = Processing Time + Shipping Time

Processing time refers to the time from when we receive your order to when we physically ship it. It depends on the time of the quality controls, the packaging and the stock of products.

Standard shipping usually takes 15-25 business days.
When you place an order, it usually takes 7-10 business days to process and ship. And standard shipping usually takes 10-18 business days. Therefore, the delivery time is expected to be 17-28 days.

Once your order is placed, we will inform you through your registered email. You can check the shipping information of the order through the "Track my order" page.

* Shipping time is estimated and starts from the date of shipment, rather than the date of order, and may take longer than expected due to invalid address, customs clearance procedures, or other causes.
*Affected by the Covid-19, there will be some delay in delivery. We apologize for any inconvenience caused by these delays and thank you for your patience.


For most countries, our customers do not need to pay any import fees, duties, or VAT (Value Additional Tax). However, for some limited countries (especially some European countries like Germany, Italy, UK and Canada etc.) you may need to pay duties or VAT according to your countries' collection rules. We are pleased to offer international shipping to most destinations around the world.

Shipping costs

Shipping rates are calculated based on the weight of the package and the destination.

Shipping costs:

Project's name

Shipping costs

Slide Rules

Standard shipping



Free shipping




If you have any further questions, please contact our customer service at