Correct

不大不小

/ bù dà bù xiǎo /
Strokes
https://i.cchatty2.com/filters:format(webp)/fit-in/684x0/img/202102/不大不小-Chinese-idioms-Cchatty-053a12c5-359f-4dda-b1c4-8720a66c49fe-1612776208.jpg

Collocation

1
闹了不大不小的笑话
2
不大不小的年龄
3
不大不小的奇迹
4
闯了不大不小的祸

Definition

不大不小:

Literally means:

neither too big nor too small; just right

Actually means:

It means being very suitable or appropriate.

It is often used to describe something that fits well. It also means that something or someone makes people embarrassed.

表示很合适,恰到好处。

多用来称赞某事物很合适。也指某事、某人让人尴尬。

Example

Used as predicate or attributive. (作谓语、定语)
1
Jiào
lǎoshī
老师
,
tài
yán
严肃
,
jiào
xiǎozhāng
小张
,
,
shì
合适
Āi
,
zhè
nián
年纪
xiǎo
不大不小
de
,
jiào
lai
起来
zhēn
bièniǔ
别扭

Call him a teacher, too serious, call him Xiao Zhang, I am not bigger than him, nor is it appropriate. Alas, it's really awkward to call this young man.

2
Duì
xiǎoxíng
小型
bàngōngshì
办公室
láishuō
来说
,
duō
gōngnéng
功能
一体机
yóu
由于
bèi
具备
duōzhǒng
多种
gōngnéng
功能
,
yōushì
优势
míngxiǎn
明显
,
jiějué
解决
xiǎo
不大不小
de
wèn
问题

For small offices, the all-in-one has a variety of functions, the advantages are obvious, can solve not small problems.

3
juéde
觉得
men
他们
chuàngzào
创造
le
xiǎo
不大不小
de
奇迹
men
他们
jīntiān
今天
de
fēicháng
非常
hǎo
,
xiāngxìn
相信
suǒyǒu
所有
kàn
sài
比赛
de
rén
huì
wéi
zhī
zhènjīng
震惊

I think they've created a miracle. They played very well today and I'm sure everyone watching the game will be shocked.