* Sales data is not publicly available for all diary brands. Many companies keep this information confidential.
* "Diary" can have a broad definition. It could include:
* Traditional paper diaries: These come in countless styles, sizes, and brands.
* Digital diaries: Apps like Day One, Evernote, and Google Calendar also function as diaries.
* Sales vary greatly by region and year. What's popular in one country might not be in another.
However, some popular diary brands that are likely to be among the best-selling include:
* Moleskine: Known for their classic notebook design, Moleskine also offers a range of diaries.
* Leuchtturm1917: Similar to Moleskine, these diaries are popular for their high-quality paper and unique features.
* Rhodia: This brand is known for their high-quality paper and a wide variety of sizes and bindings.
* Filofax: These are a popular choice for those who prefer a customizable diary system.
Additionally, consider digital diaries. Google Calendar and other apps are likely to have a massive user base.
Ultimately, the "best-selling diary" is a matter of speculation. The best diary for you depends on your individual needs and preferences.