求婚钻戒买多大的合适？

qiuhunzuanjiedaxiaoshiyingxiangqijiagedeguanjian，genjudiaochashujuxianshi，50fenjiyishangdezuanjieshidangxiazhuliu，dagai43%zuoyoudexiaofeizhehuigoumai50fenyishangdezuanjie，qicishi1kelade，dayue27%zuoyoudexiaofeizhehuigoumaiyikelazuanjie。

qiuhunzuanjiemaiduodade，hegoumaiyusuanyouhendaguanxi。

zaiyusuanchongzudeqingkuangxia，jianyixuanze“1kela”(1kela=0.2ke)jiyishangdezuanshi，gengyoushouzangbaozhidekongjian；

yusuanyouxianzekeyitiaoxuan50fenzuoyoudezuanjie；ruoyusuanlvedi，30-50fenzuoyoudezuanjieyishixinyizhixuan。

haikeyigenjubutongzuanjiedaxiaodeyiyilaitiaoxuanzuanjie，biru：

50fen(0.50kela)：nishiwodelingyiban。50fenshi1keladeyiban，nvrenyeshinanrendelingyiban，zhaodaolingyiban，renshengjiuwanzhengle。suoyi50fenzuanjieqiuhunshihenbucuodexuanze。

57fen(0.57kela)：57xieyin“wuqi”，shiduimingzhongzhudingdeairenyizhongshifenzixindexuanshi，qiuhundeyiweiyehennong。

1kela：nishiwodequanbu/jini100%deai。1kelajiushi100fen，daibiaobaifenbai、haowubaoliudeai。tongshi1kelayishangdezhengshuduanzuanshihaijijuyoushouzangjiazhi，shengzhikongjianyefeichangda，hainengdangzuochuanjiabaoshiyong。

2kelazuanshi：1+1=2，wo+ni=women，yigerendeshijiegudanledian，lianggerendeshijietiantianmimi。

tongchangzuanjieyueda，jiageyuegui，xiangyaoyongyouxiandeyusuanmaidaogengdadezuanjie，keyishidangjiangdiyansejingdu、qiegongdengfangmiandeyaoqiu，tuijianyixiadengji：

· 50fen i-jse si1jingdu 3vg wunaikalv wuyingguang

· 70fen ise vs-sijingdu 3ex wunaikalv wuyingguang

· 1kela hse vgjingdu 3ex wunaikalv wuyingguang