[About After-Sales Service] 15-day extended return period, worry-free after-sales service.(Does not affect secondary sales) [Regarding Invoices] All prices listed for our products do not include tax. Our store can issue special or regular invoices. If you need an invoice, a tax fee will be added. Please contact customer service for details [About Customization] Our company is a factory and can provide light customization as well as custom processing.The minimum order quantity for light customization is 300-500 pairs in a single color, and the minimum order quantity for heavy customization is 1000 pairs in a single color. [About Sampling] Our company can provide samples, with a specific sampling time of 7-14 days. Please contact customer service for details [About the image package] Our store provides image data including high-resolution images, suitable for cross-border e-commerce platforms and various domestic e-commerce platforms. Please [contact customer service] if needed [Factory direct delivery] Sincerely seeking agents, supports drop shipping, quality inspection for every item.Nationwide pass is 5 yuan.Except for Xinjiang, Tibet, and Inner Mongolia. [Regarding Color Difference] Due to differences in individual monitor's brightness and contrast settings, there may be slight color differences between the picture and the actual item. [Regarding Shipping] Orders placed before 5:00 PM on the same day are usually shipped on the same day, while orders placed at other times will be shipped the next day Size 39 40 41 42 43 44 45 46 47 48 Inner length (cm) 25.5 26.2 27.1 27.5 28.4 29 29.7 30.3 30.8 31 Inner width (cm) 8.8 8.9 9.1 9.2 9.5 9.7 9.8 10 10.2 10.3 Product net weight (grams) 275 285 305 315 320 330 340 360 370 380