diff --git a/src/sizes.rs b/src/sizes.rs
index c566a3c..183bacb 100644
--- a/src/sizes.rs
+++ b/src/sizes.rs
@@ -1,10 +1,10 @@
 //! Macros for defining various array sizes, and their associated invocations.
 //!
-//! We support the following array sizes:
+//! We support the following array sizes by default:
 //!
-//! - 0-256
-//! - 272-1024 (multiples of 16)
-//! - 1040-4096 (multiples of 32)
+//! - 0-512
+//! - 528-1024 (multiples of 16)
+//! - 1040-4096 (multiples of 32 when the `extra-sizes` feature is enabled)
 
 use super::{ArraySize, AssocArraySize};
 use typenum::consts::*;
@@ -286,21 +286,261 @@ impl_array_sizes! {
     254 => U254,
     255 => U255,
     256 => U256,
+    257 => U257,
+    258 => U258,
+    259 => U259,
+    260 => U260,
+    261 => U261,
+    262 => U262,
+    263 => U263,
+    264 => U264,
+    265 => U265,
+    266 => U266,
+    267 => U267,
+    268 => U268,
+    269 => U269,
+    270 => U270,
+    271 => U271,
     272 => U272,
+    273 => U273,
+    274 => U274,
+    275 => U275,
+    276 => U276,
+    277 => U277,
+    278 => U278,
+    279 => U279,
+    280 => U280,
+    281 => U281,
+    282 => U282,
+    283 => U283,
+    284 => U284,
+    285 => U285,
+    286 => U286,
+    287 => U287,
     288 => U288,
+    289 => U289,
+    290 => U290,
+    291 => U291,
+    292 => U292,
+    293 => U293,
+    294 => U294,
+    295 => U295,
+    296 => U296,
+    297 => U297,
+    298 => U298,
+    299 => U299,
+    300 => U300,
+    301 => U301,
+    302 => U302,
+    303 => U303,
     304 => U304,
+    305 => U305,
+    306 => U306,
+    307 => U307,
+    308 => U308,
+    309 => U309,
+    310 => U310,
+    311 => U311,
+    312 => U312,
+    313 => U313,
+    314 => U314,
+    315 => U315,
+    316 => U316,
+    317 => U317,
+    318 => U318,
+    319 => U319,
     320 => U320,
+    321 => U321,
+    322 => U322,
+    323 => U323,
+    324 => U324,
+    325 => U325,
+    326 => U326,
+    327 => U327,
+    328 => U328,
+    329 => U329,
+    330 => U330,
+    331 => U331,
+    332 => U332,
+    333 => U333,
+    334 => U334,
+    335 => U335,
     336 => U336,
+    337 => U337,
+    338 => U338,
+    339 => U339,
+    340 => U340,
+    341 => U341,
+    342 => U342,
+    343 => U343,
+    344 => U344,
+    345 => U345,
+    346 => U346,
+    347 => U347,
+    348 => U348,
+    349 => U349,
+    350 => U350,
+    351 => U351,
     352 => U352,
+    353 => U353,
+    354 => U354,
+    355 => U355,
+    356 => U356,
+    357 => U357,
+    358 => U358,
+    359 => U359,
+    360 => U360,
+    361 => U361,
+    362 => U362,
+    363 => U363,
+    364 => U364,
+    365 => U365,
+    366 => U366,
+    367 => U367,
     368 => U368,
+    369 => U369,
+    370 => U370,
+    371 => U371,
+    372 => U372,
+    373 => U373,
+    374 => U374,
+    375 => U375,
+    376 => U376,
+    377 => U377,
+    378 => U378,
+    379 => U379,
+    380 => U380,
+    381 => U381,
+    382 => U382,
+    383 => U383,
     384 => U384,
+    385 => U385,
+    386 => U386,
+    387 => U387,
+    388 => U388,
+    389 => U389,
+    390 => U390,
+    391 => U391,
+    392 => U392,
+    393 => U393,
+    394 => U394,
+    395 => U395,
+    396 => U396,
+    397 => U397,
+    398 => U398,
+    399 => U399,
     400 => U400,
+    401 => U401,
+    402 => U402,
+    403 => U403,
+    404 => U404,
+    405 => U405,
+    406 => U406,
+    407 => U407,
+    408 => U408,
+    409 => U409,
+    410 => U410,
+    411 => U411,
+    412 => U412,
+    413 => U413,
+    414 => U414,
+    415 => U415,
     416 => U416,
+    417 => U417,
+    418 => U418,
+    419 => U419,
+    420 => U420,
+    421 => U421,
+    422 => U422,
+    423 => U423,
+    424 => U424,
+    425 => U425,
+    426 => U426,
+    427 => U427,
+    428 => U428,
+    429 => U429,
+    430 => U430,
+    431 => U431,
     432 => U432,
+    433 => U433,
+    434 => U434,
+    435 => U435,
+    436 => U436,
+    437 => U437,
+    438 => U438,
+    439 => U439,
+    440 => U440,
+    441 => U441,
+    442 => U442,
+    443 => U443,
+    444 => U444,
+    445 => U445,
+    446 => U446,
+    447 => U447,
     448 => U448,
+    449 => U449,
+    450 => U450,
+    451 => U451,
+    452 => U452,
+    453 => U453,
+    454 => U454,
+    455 => U455,
+    456 => U456,
+    457 => U457,
+    458 => U458,
+    459 => U459,
+    460 => U460,
+    461 => U461,
+    462 => U462,
+    463 => U463,
     464 => U464,
+    465 => U465,
+    466 => U466,
+    467 => U467,
+    468 => U468,
+    469 => U469,
+    470 => U470,
+    471 => U471,
+    472 => U472,
+    473 => U473,
+    474 => U474,
+    475 => U475,
+    476 => U476,
+    477 => U477,
+    478 => U478,
+    479 => U479,
     480 => U480,
+    481 => U481,
+    482 => U482,
+    483 => U483,
+    484 => U484,
+    485 => U485,
+    486 => U486,
+    487 => U487,
+    488 => U488,
+    489 => U489,
+    490 => U490,
+    491 => U491,
+    492 => U492,
+    493 => U493,
+    494 => U494,
+    495 => U495,
     496 => U496,
+    497 => U497,
+    498 => U498,
+    499 => U499,
+    500 => U500,
+    501 => U501,
+    502 => U502,
+    503 => U503,
+    504 => U504,
+    505 => U505,
+    506 => U506,
+    507 => U507,
+    508 => U508,
+    509 => U509,
+    510 => U510,
+    511 => U511,
     512 => U512,
     528 => U528,
     544 => U544,