These are 2 size to choose:

USB 3.2 to 5Gbps Etherent –

The product is equipped with Realtek RTL8157 smart chip.RJ45 Ethernet ports support ultra-fast network speeds of up to 5000Mbps (5Gbps), which is 5 times the performance of traditional Gigabit Ethernet adapters, and are backward compatible with 10/100/1000/2500Mbps. Enjoy faster file transfers, smoother video conferences, and seamless media streaming.
Standard –

The Ethernet ports comply with the IEEE 802.3bz (2500/5000Mbps) standard, while the Type-C follows the USB Spec 3.2 standard. This device guarantees optimal performance for various network demands. Please connect to a USB 3.2 or higher port to avoid speed limitations that may arise with USB 2.0/3.0.
Necessary for 5G Speed –

1.Broadband speed must exceed 5G;

2. Modem/Router should support 5G network output;

3. Ethernet cable needs to be of CAT6A or higher grade;

4. Connect to a laptop port that is USB 3.2 or higher. Please download and install the driver software!
Lightweight Design –

This device features a high-quality aluminum alloy casing and internal heat dissipation design, ensuring durability and stability for long-term use. Emphasizing convenience, its compact and lightweight design optimizes space utilization in home, office, or mobile settings.
Compatibility –

Works with Windows 11, Mac OS 10.13.6 to 11.x, Linux and above. Driver download and install may be required on older OS and so on.

2500Mbps USB 3.0/Type C Network card

Feature:
1.High-Speed Network Connection: This Type A/Type Cto 2.5G RJ45 ethernet adapter enables a high-speed network connection through the Type-C USB3.0 to RJ45 Ethernet port, supporting up to 2500Mbps. Enjoy fast and stable network connectivity, effortlessly meeting your high-speed transmission and downloading needs.
2.Versatile Conversion: This USB C to 2.5G ethernet adapter features a Type-C USB3.0 to RJ45 Ethernet port design, allowing convenient conversion of Type-C interfaces on laptops or other devices to RJ45 Ethernet interfaces. This versatile conversion enables you to connect to wired networks and seamlessly access NAS storage functionality.
3.Powerful Storage Performance: RJ45 LAN network converter equipped with a 2.5G network card, this device supports speeds up to 2500Mbps, providing outstanding storage performance. Enjoy high-speed data transfers and cloud storage, effortlessly manage and share large amounts of data, fulfilling the storage needs of gamers and laptop users.
4.Designed for Laptop Gaming: This ethernet converter is specifically designed for laptop gaming users, offering high-speed network connectivity and storage functionality. Whether engaging in multiplayer gaming competitions, online streaming, or transferring large files, it meets the demands of gaming users for high-speed internet and reliable storage.
5.Easy to Use: This ethernet LAN adapter is extremely user-friendly. Simply plug the Type-C USB3.0 to RJ45 Ethernet port into the Type-C interface of your laptop, and you can start using the high-speed network and NAS storage functionality. It features a plug-and-play design, requiring no additional drivers or configurations, providing a hassle-free user experience.

Specification:
Origin: Mainland China
Type: WIRED
Transmission Rate: 10/100/1000Mbps
Kind: External
Package: Yes
Product Name: 2.5G Network Card
Outer material: TPE
Shell material: aluminum alloy
Shell color: Space gray
Transmission direction: USB-A/Type-C to RJ45
Thread length: 175mm
Interface type: USB-A/Type-C/RJ45
Transmission rate: 10/100/1000/2500Mbps
Product size: 62.00×27.00×14.80mm
Product size: 2.44×1.06×0.58inch

Note:
Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you!
Please allow 1-2cm measuring deviation due to manual measurement.