I bought a 大部頭字典 in November

 

4000 pages = 16000 pages,

17 lb. with a magnifier in a local library sale.

In Amazon:

https://www.amazon.com/Compact-Oxford-English-Dictionary-Set/dp/019861117X/ref=pd_sbs_d_sccl_2_1/140-8371613-0685918?pd_rd_w=Co8Tt&content-id=amzn1.sym.d95de1d6-8400-4c9d-8ae8-144769325aef&pf_rd_p=d95de1d6-8400-4c9d-8ae8-144769325aef&pf_rd_r=QCTV3VBZJX4YMFY8RXDB&pd_rd_wg=8xDZX&pd_rd_r=dbb282c1-6827-4079-845c-ec3924f302a7&pd_rd_i=019861117X&psc=1