Windows Errors? Fix Them Before They Spread
Repair common Windows errors and clear accumulated junk for a smoother, more stable PC - no reinstall needed.Free scan · no reinstallOutdated Drivers Are Slowing You Down
One free scan finds every outdated or missing driver and matches the right update for your exact hardware.Free scan · exact hardware matchFor the Seiko Prospex Speedtimer SSC813, start by comparing its 45.5 mm lug-to-lug length with the top of your wrist, then consider its 39.0 mm case diameter and 13.3 mm thickness. These are Seiko’s published specifications—not a guarantee that a particular wrist circumference will fit. “Panda” describes the contrasting dial style; the dimensions here are specifically for the SSC813.
What “Seiko panda watch” means here
“Panda” refers to a high-contrast dial, commonly a light dial with dark sub-dials. Seiko has used the term for a white dial with two black sub-dials. This guide focuses on one model: the Prospex Speedtimer solar chronograph SSC813. Other Seiko chronographs may have panda-style dials but different dimensions, so check the reference number before using these measurements.
As an Amazon Associate I earn from qualifying purchases.
Seiko’s Speedtimer collection identifies the SSC813 as a solar chronograph and highlights its heritage-inspired design, 39 mm diameter and curved sapphire glass. See Seiko’s Speedtimer collection information.
SSC813 dimensions that affect fit
These figures are Seiko’s published specifications for the SSC813, not independent measurements. Seiko’s official SSC813 specifications list:
#1 Best Overall
- Read Before You Buy — No Video Output: These adapters support charging and USB 2.0 data transfer, but cannot transmit video signals. Except for standard USB webcams (which use USB data only), they are not compatible with HDMI/DisplayPort cables, video-capable USB-C hubs, or docking stations with video output.
- Convert USB-A Ports to USB-C: Designed to connect USB-C earphones, cables, flash drives, card readers, and other USB-C accessories to standard USB-A ports. Plug-and-play with no drivers or software required.
- Aluminum Alloy Housing: Built with a sturdy aluminum alloy shell that aids in heat dissipation and protects against daily wear and scratches. Designed to maintain a stable and secure connection.
- Compact & Travel-Friendly: The ultra-compact design allows the adapter to stay plugged into your device without blocking adjacent ports or adding bulk, reducing wear and tear on your original USB ports.
- 12-Month Warranty: Backed by a 12-month manufacturer warranty for peace of mind. Designed to meet strict quality control standards for reliable everyday performance.
| Specification | Published value | Why it matters |
|---|---|---|
| Case diameter | 39.0 mm | A first indication of how broad the watch may look on your wrist. |
| Lug-to-lug | 45.5 mm | The span across the wrist; compare it with the flat area on top of your wrist. |
| Case thickness | 13.3 mm | Affects how tall the watch feels and whether it clears a fitted cuff comfortably. |
| Distance between lugs | 20 mm | Useful when checking band width, but it does not by itself establish that every 20 mm band will attach correctly. |
| Weight | 161.0 g | Provides a sense of the stated overall weight; how substantial it feels will depend on the wearer and bracelet adjustment. |
| Bracelet | Stainless steel | The supplied bracelet is part of the watch’s wearing experience and needs suitable adjustment. |
How to check whether the SSC813 suits your wrist
1. Measure where you normally wear a watch
Wrap a flexible measuring tape or paper strip around your wrist at your usual watch position. Keep your hand lightly open and relaxed. The measuring tool should touch the wrist without being pulled tight or left loose. Seiko’s wrist-measuring guide describes this approach.
2. Compare the 45.5 mm length with your wrist
Look at the top of your wrist and consider whether the case’s lug-to-lug span will sit within its natural width. The published length is a comparison point, not a universal cutoff: Seiko does not publish an SSC813 wrist-circumference chart or a minimum or maximum wrist size for this model.
Rank #2
- 5-in-1 USB-C Hub: Experience comprehensive connectivity featuring a Power Delivery input, two USB-A 2.0 ports, a USB-A 3.0 port, and an HDMI port. (Note: The USB-C power delivery input port is only for connecting an external wall charger to power your laptop and cannot power peripheral devices.)
- 90W Pass-Through Charging: Achieve optimal charging with 90W pass-through power to your laptop, supported by a total input of 100W, with the hub reserving 10W for operational efficiency. (Note: Wall charger not included.)
- Quick Data Transfers: Accelerate your productivity with rapid data transfers using a high-speed 5Gbps USB 3.0 port and two 480Mbps USB 2.0 ports.
- 4K HDMI Display: Enhance your visual experience with a hub capable of delivering 4K resolution at 30Hz in both mirror and extend modes. Please note that this hub is compatible with MacBook (macOS 12 and newer), Windows 10 and 11, ChromeOS, and laptops equipped with DP Alt Mode and Power Delivery. Note: This device is not compatible with Linux.
- What You Get: Anker USB-C Hub (5-in-1, 4K HDMI), welcome guide, 18-month warranty, and our friendly customer service.
3. Think about diameter and thickness together
The 39.0 mm diameter helps indicate the watch’s visual footprint, while the 13.3 mm thickness affects its profile. If you prefer a low-profile watch or often wear fitted sleeves, pay particular attention to the thickness. These dimensions describe the case; they do not predict exactly how prominent it will look or feel on every wrist.
4. Check bracelet comfort after adjustment
Seiko’s general band guidance recommends leaving a little clearance and enough room to insert a finger between the band and wrist. Treat that as a comfort check, not a precise sizing formula. The bracelet should feel secure without being uncomfortably tight. Seiko’s instruction manuals include general band-length and comfort guidance.
Rank #3
- Sleek 7-in-1 USB-C Hub: Features an HDMI port, two USB-A 3.0 ports, and a USB-C data port, each providing 5Gbps transfer speeds. It also includes a USB-C PD input port for charging up to 100W and dual SD and TF card slots, all in a compact design.
- Flawless 4K@60Hz Video with HDMI: Delivers exceptional clarity and smoothness with its 4K@60Hz HDMI port, making it ideal for high-definition presentations and entertainment. (Note: Only the HDMI port supports video projection; the USB-C port is for data transfer only.)
- Double Up on Efficiency: The two USB-A 3.0 ports and a USB-C port support a fast 5Gbps data rate, significantly boosting your transfer speeds and improving productivity.
- Fast and Reliable 85W Charging: Offers high-capacity, speedy charging for laptops up to 85W, so you spend less time tethered to an outlet and more time being productive.
- What You Get: Anker USB-C Hub (7-in-1), welcome guide, 18-month warranty, and our friendly customer service.
5. Verify details before choosing another band
The SSC813 has a published 20 mm distance between its lugs. That measurement can help narrow band width, but width alone does not prove compatibility: confirm the band’s attachment and model details before buying.
What a try-on can tell you
If you can try the watch on, check how the case sits across your wrist and how the bracelet feels once it has been sized. Notice whether the lugs extend beyond the top of your wrist, whether the case feels too tall for your preference, and whether the adjusted bracelet has comfortable clearance. A circumference measurement can help you describe your wrist, but it cannot replace checking the watch’s shape and feel on your own wrist.
Rank #4
- Dual Converters, Infinite Potential：Includes 2× USB C male to USB A female adapters and 2× USB A male to USB C female adapters. Perfect for a wide range of uses—tablets with Bluetooth keyboards, expand USB ports on macbook, and more. Two different converters for all your daily needs
- Next-Level 10Gbps & 3A Charging: No more slow 480Mbps, this usb to usb c adapter has a transfer speed of up to 10Gbps, allowing you to do more transferring in less time. This usb adapter fits both USB A and USB C charger, supporting up to 3A fast charging
- Upgraded Exquisite Craftsmanship: With an aluminum alloy housing and metal connector, the usbc to usb adapter is extremely durable and sturdy. Rigorously tested to withstand more than 10,000 times of plugging and unplugging, ensuring long-lasting performance
- Broad Compatible: The usb c to usb adapter widely supports all USB C/ USB A devices like laptops, tablets, cellphones, car chargers, and phone chargers. Such as compatible with MacBook Pro/Air 2023/2022, Thunderbolt 4/3 Devices,Apple MagSafe Watch 9/8/7/SE/Ultra, iPad Pro 2022/2021, Samsung Galaxy S23/S20/S10, and iPhone 17/16/15 Pro. Plug and play
- Please Note: To reach 10Gbps speed, keep the cable under 3.3 ft. For USB A Male to USB C adapters, try flipping the USB C connector. USB C Male to USB A adapters support bidirectional 10Gbps transfer within 3.3 ft
Design heritage is not a fit specification
Seiko’s 2019 chronograph-history announcement describes the SRQ029 as drawing on the 1964 Crown Chronograph, including a box-shaped crystal and inwardly tilted case shape intended to sit close to the wrist. That passage refers to the SRQ029, not the SSC813, so it is historical design context rather than evidence about SSC813 fit. Read Seiko’s 2019 announcement.
Quick Recap
Best Value
- 5-in-1 Connectivity: Equipped with a 4K HDMI port, a 5 Gbps USB-C data port, two 5 Gbps USB-A ports, and a USB C 100W PD-IN port. Note: The USB C 100W PD-IN port supports only charging and does not support data transfer devices such as headphones or speakers.
- Powerful Pass-Through Charging: Supports up to 85W pass-through charging so you can power up your laptop while you use the hub. Note: Pass-through charging requires a charger (not included). Note: To achieve full power for iPad, we recommend using a 45W wall charger.
- Transfer Files in Seconds: Move files to and from your laptop at speeds of up to 5 Gbps via the USB-C and USB-A data ports. Note: The USB C 5Gbps Data port does not support video output.
- HD Display: Connect to the HDMI port to stream or mirror content to an external monitor in resolutions of up to 4K@30Hz. Note: The USB-C ports do not support video output.
- What You Get: Anker 332 USB-C Hub (5-in-1), welcome guide, our worry-free 18-month warranty, and friendly customer service.
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
