Paper × 841 mm). A1 is half the size of a sheet of A0 (i.e., 594 mm × 841 mm), such that two sheets of A1 placed side by side are equal to one sheet of A0. A2 is half the size of a sheet of A1, and so forth. Common sizes used in the office and the home are A4 and A3 (A3 is the size of two A4 sheets). The density of paper ranges from for tissue paper to for some speciality paper. Printing paper is about . Paper may be classified into seven categories: Some paper types include:
How Can I Be Sure the album's first single, "How Can I Be Sure" became the second of Cassidy's three Top 30 solo hits on the "Billboard" Hot 100 with a peak of #25, Cassidy's third Top 30 hit (and fifth and final Top 40 hit) being " "Lyin' to Myself" eighteen years later in 1990. On the "Billboard" Easy Listening chart "How Can I Be Sure" peaked at #3. In the British Isles "How Can I Be Sure" would afford Cassidy a #1 hit on both the Irish Singles Chart and also (for two weeks) the singles chart for the UK, being the second