B5 Graph Paper Notebook Black Leather - 140 Pages, 5mm Grid

In this review of the RETTACY B5 graph paper notebook, the bottom line is simple: students, engineers, and anyone who values a durable medium-size grid notebook will appreciate the combination of a leather hardcover and thick 100 GSM paper. The reviewer found the 7.6 in by 10 in format roomy enough for detailed diagrams yet compact for a backpack, and the 5 mm grid spacing ideal for technical notes and neat math work. The twin-wire spiral, pen holder and elastic closure make it practical for everyday academic and project use.

Key Features

• B5 7.6 in x 10 in size: Provides a balanced workspace that fits into most backpacks while giving ample room for detailed sketches and notes.
• 140 pages of 100 GSM paper: Thick, acid-free paper reduces ghosting and bleed-through so pens and most markers produce clean lines.
• 5 mm grid layout: The precise grid spacing supports engineering drawings, math work, and neatly aligned notes without crowding the page.
• Leather hardcover with gold foil design: A smooth, protective cover with a Tree of Life foil detail gives the notebook a refined look and lasting protection.
• Practical accessories: Twin-wire spiral binding, elastic closure bands, ribbon bookmark, inner pocket, pen holder and sticky tabs keep pages organized and portable.

Who It's For

This notebook is aimed at students, engineers, architects, hobby designers, and anyone who needs a reliable grid layout for technical work or structured journaling. The sturdy leather hardcover and 100 GSM paper make it a good choice for users who prefer to preserve their work without worrying about bleed or tear-through.

Those who want ultra-compact pocket notebooks, disposable cheap pads, or extremely large poster-sized layouts should look elsewhere; this is a medium-format, premium paper option rather than a replacement for specialized drafting boards or pocket memo pads.

Pros & Cons

Pros

• High-quality 100 GSM acid-free pages that handle pens and markers with minimal ghosting.
• Durable leather hardcover and twin-wire spiral allow the notebook to lie flat for accurate drafting and writing.
• Well thought-out extras like ribbon bookmark, pen holder, inner pocket and sticky index tabs improve organization.
• 5 mm grid spacing is versatile for math, engineering, and structured planning.

Cons

• Medium B5 size may be too small for large-format drawings and too large for true pocket carry for some users.

Specifications

Brand	RETTACY
Size	B5 (7.6 in x 10 in)
Pages	140 pages
Paper weight	100 GSM, acid-free
Grid spacing	5 mm (5 grids per inch)
Cover	Leather hardcover with gold foil Tree of Life
Binding and extras	Twin-wire spiral, pen holder, elastic closure, ribbon bookmark, inner pocket, sticky index tabs

Our Verdict

The RETTACY B5 graph paper notebook is a solid choice for students and professionals who need a mid-size, durable grid notebook with premium 100 GSM paper and practical organization features. It balances portability and workspace well, and the leather cover plus accessories add real value for regular use and long-term preservation of notes.

Frequently Asked Questions

Is the paper suitable for fountain pens?
The 100 GSM acid-free paper is thicker than standard notebook paper and reduces bleed-through, but results can vary by ink and nib; try a single page first.

Does the notebook lie flat for drawing?
Yes, the twin-wire spiral binding allows the notebook to lie flat, which helps with accurate diagrams and neat handwriting.

Are there organizational accessories included?
Yes, it includes an inner pocket, ribbon bookmark, pen holder, elastic closure bands and sticky index tabs for easy organization.