| Model | Total weight | Weight without cap | Total length | Length without cap | Max diameter |
| Writer long | 27g | 17g | 166mm | 145mm | 15mm |
| Cigar long | 25g | 17g | 166mm | 145mm | 15mm |
| Writer portable | 22g | 15g | 150mm | 128mm | 15mm |
| Cigar portable | 20g | 15g | 150mm | 128mm | 15mm |
| Writer Piccolo | 22g | 15g | 130mm | 116mm | 15mm |
| Cigar Piccolo | 20g | 15g | 130mm | 116mm | 15mm |
| Deskpen | 25g | 24g | 200mm | 175mm | 15mm |
| Neo Standard | 24g | 14g | 150mm | 135mm | 15mm |
| Decapod(ST) Writer | 20g | 13g | 150mm | 128mm | 15mm |
| Decapod(ST) Cigar | 17g | 13g | 150mm | 128mm | 15mm |
| Decapod(TW) Writer | 24g | 14g | 150mm | 128mm | 16mm |
| Decapod(TW) Cigar | 20g | 14g | 150mm | 128mm | 16mm |
| D-17mm Long | 28g | 22g | 166mm | 145mm | 17mm |
| D-17mm Portable | 26g | 20g | 150mm | 138mm | 17mm |
| Ryogiri | 24g | 18g | 150mm | 145mm | 17mm |
| Dorsal fin ver.1 | 26g | 18g | 150mm | 145mm | 17mm |
| Dorsal fin ver.2 | 26g | 20g | 150mm | 145mm | 17mm |
| * Since the NAKAYA pen is hand-made, the above dimensions may vary slightly. Please take them as a guideline. | |||||
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| Other companies’ models to compare *The size and weight below are not official. Nakaya measured them just for comparison purposes. | |||||
| Montblanc 149 | 32g | 21.2g | 148mm | 133mm | 17.2mm |
| Montblanc 146 | 25.4g | 15.5g | 146mm | 126mm | 15mm |
| Montblanc 144 | 16.5g | 9.2g | 136mm | 118mm | 12mm |
| Parker Sonnet Premier | 29.6g | 18.6g | 133mm | 124mm | 12.4mm |
| Parker Duofold Centennial | 28.9g | 19.3g | 137mm | 128mm | 15.2mm |
| Pelikan M800 | 28.7g | 20.3g | 142mm | 128mm | 15.8mm |
| Waterman Carene | 34g | 23.5g | 144mm | 129mm | 13mm |
Size and weight of Nakaya fountain pens
Nakaya standard