System design interviews happen on whiteboards, and practicing on one beats a notebook, and the best whiteboard for system design interview search turns up large magnetic boards, double-sided picks and portable minis. We compared five listings by performance, build, value, safety and warranty, using only what each listing publishes. Every pick names its stated size and surface.
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Quick picks
Best Overall Amazon Basics Large Whiteboard: Large magnetic board with pen tray Check price on Amazon
Best Double-Sided WALGLASS Double-Sided Board: Magnetic both sides, scratch-resistant Check price on Amazon
Best 24×18 Amazon Basics 24×18 Whiteboard: Magnetic, mounts either way Check price on Amazon
Most Portable TSJ OFFICE 16×12 Whiteboard: 16×12 with handle, 16 ounces Check price on Amazon
Smallest Scribbledo 9×12 Whiteboard: 9×12 double-sided mini Check price on Amazon
The picks
| # | Product | Office Score | Buy |
|---|---|---|---|
| 1 | Amazon Basics Large Whiteboard | 9.7/10 | Buy on Amazon |
| 2 | WALGLASS Double-Sided Board | 9.6/10 | Buy on Amazon |
| 3 | Amazon Basics 24x18 Whiteboard | 9.6/10 | Buy on Amazon |
| 4 | TSJ OFFICE 16x12 Whiteboard | 9.5/10 | Buy on Amazon |
| 5 | Scribbledo 9x12 Whiteboard | 9.5/10 | Buy on Amazon |
Amazon Basics Large Whiteboard
A large Amazon Basics magnetic dry erase whiteboard with aluminum trim and pen tray, wall-mountable, 2.58 kg.
Pros
- Large writing area for system diagrams
- Magnetic surface for notes and reminders
- Sturdy aluminum trim with pen tray
- Wall-mountable, long-lasting use
Cons
- No warranty term is stated
- 2.58 kg needs solid mounting
- Large size needs wall space
- Markers not stated as included
Detailed Review
Its Office Score of 9.7/10 comes from performance 33/35, build 21/25, value 20/25, safety not scored (non-powered gear) and warranty 0/5: 74 of 90 points, placed on our 9.2 to 9.8 scale.
Key Specifications
Figures as published on the retailer listing, collected 18 October 2026. Performance figures are manufacturer rated.
Safety and Warranty
What this listing states. This product does not plug in or run on a battery, so safety is not part of its score. No warranty term, so warranty scores zero. See How We Pick.
Follow the manual. Assemble and use the product as the maker describes, stay under any stated capacity, and read the manual before first use.
This is general buying information, not professional advice. Follow each product manual and local rules, and see our Safety Disclaimer.
WALGLASS Double-Sided Board
A WALGLASS double-sided magnetic dry erase whiteboard with aluminum frame and scratch-resistant surface.
Pros
- Double-sided: twice the writing space
- Magnetic on both sides
- Scratch-resistant smooth surface
- Aluminum frame, lightweight
Cons
- No warranty term is stated
- No size is stated
- Double-sided needs a stand or easel
- Magnets not stated as included
Detailed Review
Its Office Score of 9.6/10 comes from performance 32/35, build 20/25, value 20/25, safety not scored (non-powered gear) and warranty 0/5: 72 of 90 points, placed on our 9.2 to 9.8 scale.
Key Specifications
Figures as published on the retailer listing, collected 18 October 2026. Performance figures are manufacturer rated.
Safety and Warranty
What this listing states. This product does not plug in or run on a battery, so safety is not part of its score. No warranty term, so warranty scores zero. See How We Pick.
Follow the manual. Assemble and use the product as the maker describes, stay under any stated capacity, and read the manual before first use.
This is general buying information, not professional advice. Follow each product manual and local rules, and see our Safety Disclaimer.
Amazon Basics 24x18 Whiteboard
An Amazon Basics 24 by 18 inch magnetic dry erase whiteboard with aluminum frame, 0.77 kg.
Pros
- 24 by 18 inches, good practice size
- Magnetic surface
- Mounts vertical or horizontal
- 0.77 kg, easy to hang
Cons
- No warranty term is stated
- Smaller than the large model
- Mounting hardware included, board only
- Markers not stated as included
Detailed Review
Its Office Score of 9.6/10 comes from performance 32/35, build 20/25, value 19/25, safety not scored (non-powered gear) and warranty 0/5: 71 of 90 points, placed on our 9.2 to 9.8 scale.
Key Specifications
Figures as published on the retailer listing, collected 18 October 2026. Performance figures are manufacturer rated.
Safety and Warranty
What this listing states. This product does not plug in or run on a battery, so safety is not part of its score. No warranty term, so warranty scores zero. See How We Pick.
Follow the manual. Assemble and use the product as the maker describes, stay under any stated capacity, and read the manual before first use.
This is general buying information, not professional advice. Follow each product manual and local rules, and see our Safety Disclaimer.
TSJ OFFICE 16x12 Whiteboard
A TSJ OFFICE 16 by 12 inch magnetic whiteboard with narrow frame, reinforced corners and top handle, 16 ounces.
Pros
- Portable with top handle
- Reinforced corners
- Magnetic surface
- 16 ounces, lightweight
Cons
- No warranty term is stated
- 16 by 12 inches is small for diagrams
- Narrow frame only
- Portable, not wall-first
Detailed Review
Its Office Score of 9.5/10 comes from performance 29/35, build 19/25, value 19/25, safety not scored (non-powered gear) and warranty 0/5: 67 of 90 points, placed on our 9.2 to 9.8 scale.
Key Specifications
Figures as published on the retailer listing, collected 18 October 2026. Performance figures are manufacturer rated.
Safety and Warranty
What this listing states. This product does not plug in or run on a battery, so safety is not part of its score. No warranty term, so warranty scores zero. See How We Pick.
Follow the manual. Assemble and use the product as the maker describes, stay under any stated capacity, and read the manual before first use.
This is general buying information, not professional advice. Follow each product manual and local rules, and see our Safety Disclaimer.
Scribbledo 9x12 Whiteboard
A Scribbledo 9 by 12 inch double-sided dry erase whiteboard with wood frame, 0.18 kg.
Pros
- Double-sided, blank both sides
- 9 by 12 inches, ultra portable
- 0.18 kg
- Reusable practice surface
Cons
- No warranty term is stated
- 9 by 12 inches is tiny for interviews
- Wood frame, less durable
- Student-first design
Detailed Review
Its Office Score of 9.5/10 comes from performance 28/35, build 18/25, value 19/25, safety not scored (non-powered gear) and warranty 0/5: 65 of 90 points, placed on our 9.2 to 9.8 scale.
Key Specifications
Figures as published on the retailer listing, collected 18 October 2026. Performance figures are manufacturer rated.
Safety and Warranty
What this listing states. This product does not plug in or run on a battery, so safety is not part of its score. No warranty term, so warranty scores zero. See How We Pick.
Follow the manual. Assemble and use the product as the maker describes, stay under any stated capacity, and read the manual before first use.
This is general buying information, not professional advice. Follow each product manual and local rules, and see our Safety Disclaimer.
As an Amazon Associate I earn from qualifying purchases.
Compare the picks
| Board | Office Score | Size | Magnetic | Warranty | Amazon |
|---|---|---|---|---|---|
| Amazon Basics Large Whiteboard | 9.7/10 | Large | Yes | Not stated | View on Amazon |
| WALGLASS Double-Sided Board | 9.6/10 | Not stated | Yes | Not stated | View on Amazon |
| Amazon Basics 24×18 Whiteboard | 9.6/10 | 24×18 in | Yes | Not stated | |
| TSJ OFFICE 16×12 Whiteboard | 9.5/10 | 16×12 in | Yes | Not stated | |
| Scribbledo 9×12 Whiteboard | 9.5/10 | 9×12 in | No | Not stated |
Specifications are manufacturer rated as listed, collected 18 October 2026.
How we scored them
The Office Score weighs performance, build, value, safety and warranty. Writing area and magnetic surface drove performance; stated frames drove build. None of the five listings states a warranty term, so none earns warranty points. How we pick explains the weights.
| Product | Office Score | Perf. /35 | Build /25 | Value /25 | Safety /10 | Warranty /5 |
|---|---|---|---|---|---|---|
| Amazon Basics Large Whiteboard | 9.7 | 33 | 21 | 20 | n/a | 0 |
| WALGLASS Double-Sided Board | 9.6 | 32 | 20 | 20 | n/a | 0 |
| Amazon Basics 24×18 Whiteboard | 9.6 | 32 | 20 | 19 | n/a | 0 |
| TSJ OFFICE 16×12 Whiteboard | 9.5 | 29 | 19 | 19 | n/a | 0 |
| Scribbledo 9×12 Whiteboard | 9.5 | 28 | 18 | 19 | n/a | 0 |
Scores run from 9.2 to 9.8: each product’s point total is placed on that range, so more points always means a higher score. Safety counts only for powered gear or where the listing states safety features; where it does not apply, the score is taken over the remaining 90 points.
How to choose the best whiteboard for system design interview
Go big
Diagrams need room: the Amazon Basics large board and the double-sided WALGLASS give the most space. The 9 by 12 Scribbledo is too small for real practice.
Check magnetic and erasability
Three of the five are magnetic for sticking notes; the WALGLASS states a scratch-resistant surface that erases without stain.
Decide wall or portable
The large boards wall-mount; the TSJ OFFICE 16 by 12 has a handle for carrying. Pick the setup that matches your practice space.
Before you buy
- Confirm the size fits your diagrams and your wall.
- Check magnetic surface if you use magnets.
- Note none of the listings states a warranty term.
Frequently Asked Questions
What size whiteboard for system design practice?
As large as your wall allows: the Amazon Basics large board is the roomiest pick here.
Which whiteboards are double-sided?
The WALGLASS and the Scribbledo 9 by 12: twice the writing space.
Which whiteboard is portable?
The TSJ OFFICE 16 by 12 with a top handle, at 16 ounces.
Related guides
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