a1 model (from sharpening) a2 model (knowledgeable and cautious) a3 model (eat the bitterness of life without learning) a4 model (don't be lazy if you don't want to lose) a5 model (zeng guofan six rings) a6 (have read many volumes of books) a7 model (it's not difficult to give up and stick to cool) a8 (opportunities for those who are prepared) a9 style (ten family rules) a10 model (can be admitted in time) a11 model (although the road is far away, it will arrive) a12 model (dream will not shine) a13 (books you can't recite) a14 model (why don't you work hard) a15 model (how self-discipline do you have) a16 model (try to catch up with that one) a17 (diligent) a18 (diligent learning and meditation) a19 (encouraging poetry) a20 model (life is like sailing against the current) a21 model (there is a road to work hard in shushan) a22 model (shushan has a road to work hard for path 1) a23 model (daily upward) a24 model (daily upward 1) a25 model (my direction goes forward) a26 (for my son) a27 (for my daughter) a28 (good habit of doing homework) a29 (endless learning) a30 (learning) a31 style (hard learning, cool persistence) a32 model (hard learning, cool persistence 1) a33 model (one effort and one harvest) a34 (to yourself) a35 (self-discipline persistence)

7 inches (inner diameter: 12.7 * cm) 8 inches (inner diameter: 15.2 * cm) 10 inches (inner diameter: 20.3 * cm) a4 (inner diameter: 21 * cm) a3 (inner diameter: 29.7 * 42cm)